Failed to fetch ubuntu как исправить

I don’t understand why this issue could be survive. It display this error message all the time

Fetched 32.8 MB in 1min 16s (430 kB/s)                                         
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-i386/Packages  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.

I was tried to using these commands (which found in this question)

sudo apt-get clean
sudo rm -vf /var/lib/apt/lists/*
sudo rm -vf /var/lib/apt/lists/partial/*
sudo apt-get update

No luck for me. That dump message show up again. Always failed with security.ubuntu.com. My internet connection is OK, I’m able to ping to security.ubuntu.com without any trouble.

So, the question here is why? And anyone out there can help me out of this? I’m going to crazy!

The apt command-line tool is one of the critical components of Debian and Ubuntu-based Linux distros. It facilitates retrieval and installation of packages reliably, thus, allowing users to enjoy the hassle-free installation of software and its dependencies. It is certainly one of the distinguishing features of Linux.

Sometimes, you may encounter the annoying Failed to fetch error while trying to use the apt tool which may look something like the following:

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/precise/Release.gpg
  Temporary failure resolving 'in.archive.ubuntu.com'

In this tutorial, we will take a look at possible reasons one may encounter this error and its solutions.

Are there any pre-requisites?

There are no major pre-requisites for being able to fix this issue but keep in mind that you need to have the superuser privilege for your device. If you are not the admin or do not have access to the password of the device, you might not be able to fix this issue.

Apt Get Needs Password
apt-get requires the superuser password

With the pre-requisites out of the way, now let us look at the possible reasons this error may occur.

Reason 1: Issues with your internet connection

As the apt command fetches packages from the web servers, there is no doubt that you must to have a proper internet connection.

If you are unsure why the terminal is unable to connect to the internet, go through the following steps to perform a diagnosis.

Diagnosis: Run the ping tool

The best way to determine whether the terminal is connected to the internet is by trying to ping a host. Enter the following command:

Ping Google
Checking whether the terminal is able to successfully connect to a web host

If you are getting a continuous sequence of replies from the host as shown in the above image, it means that your internet is working fine. Press Ctrl+C to stop the ping tool.

Solution: Fixing the internet connection

One of the following things might get you back online:

  • Look for disconnected ethernet cables.
  • The WiFi/Network adapter might be switched off, try turning it on.
  • Look for malfunctions in your network devices.
  • Try contacting the ISP.

Reason 2: You might be connected to a proxy network

If your device is connected to a network belonging to an organization (like your office, university, library, etc.), chances are, you might be connected to the internet through a proxy server.

You will need to configure the proxy settings for APT to work. Follow the steps below:

Solution 1: Configuring the proxy settings for APT

We have to manually create a separate configuration file called proxy.conf in the apt configuration folder.

  1. Enter the following code in the terminal:
sudo touch /etc/apt/apt.conf.d/proxy.conf

When prompted, enter the password. This code will create the desired proxy.conf file in the location /etc/apt/apt.conf.d/proxy.conf.

2. Using the Vi editor, now we will edit the text file. Enter the following code:

sudo vi /etc/apt/apt.conf.d/proxy.conf
Configure Proxy Linux
The commands for configuring proxy

3. You will enter the edit mode, now add the following piece of code:

Acquire {
  HTTP::proxy "http://<proxy-hostname>:<proxy-port>";
  HTTPS::proxy "http://<proxy-hostname>:<proxy-port>";
}

Make sure that you replace the <proxy-hostname> with your proxy server hostname and <proxy-port> with the port. For example, if your proxy hostname is 10.32.0.1 and port is 8080, the code will look like this:

Acquire {
  HTTP::proxy "http://10.32.0.1:8080";
  HTTPS::proxy "http://10.32.0.1:8080";
}
Setup Proxy Terminal
Code for setting up the HTTP and HTTPS proxies

4. Exit the vi editor saving the changes by entering :wq!

5. Restart your device and check if your problem is resolved.

Reason 3: You are using a release that has reached its EoL (End of Life)

If you are using an old or interim release (like the Ubuntu 21.04), it might have reached its end of life and isn’t supported anymore. You will need to upgrade to a newer version for the proper function of APT.

Solution 1: Upgrading your system to the latest version

1. First, you need to retrieve the updated package list:

2. Now, run the below codes to download and install the required packages:

sudo apt-get upgrade
sudo apt-get dist-upgrade

3. You will need to install the update manager:

 sudo apt-get install update-manager-core

4. Reboot your device, then enter the following code to start downloading and upgrading your distribution:

Upgrade Distribution
Enter y to Continue

Now the system will start downloading the latest version. It might take hours depending on the download size and your device specification.

References

Ubuntu Help & Ask Ubuntu: EOLUpgrades – Community Help Wiki (ubuntu.com) | Setting proxy for apt from the terminal – Ask Ubuntu

Conclusion

Unless one fully understands the details behind the exceptions thrown by the terminal in Linux, solving issues like this can become somewhat tricky. Nevertheless, I hope that the above-mentioned guide was able to solve the problems.

Кто не встречал ошибок в процессе обновления Ubuntu? Ошибки обновления в Ubuntu и иных дистрибутивах Linux встречаются часто и не вызывают удивления. В статье описан ряд часто встречающихся ошибок и способы их решения.

Данная статья является частью серии, посвященной новичкам в Ubuntu, и она призвана помочь лучше понять работу с дистрибутивом.

В данном туториале мы рассмотрим часто встречающиеся ошибки, которые можно встретить при обновлении Ubuntu. Они зачастую происходят тогда, когда пытаешься добавить софт или репозитории самостоятельно.

Если во время обновления системы появляются ошибки, паниковать не стоит. Ошибки случаются часто и решения есть. Вы научитесь как решить часто встречающиеся ошибки.

Ошибка 0: Failed to download repository information

Многие пользователи Ubuntu обновляют систему через графическую программное средство обновления. Вам приходит оповещения, что стали доступными обновления для вашей системы и теперь можно нажать на кнопку для начала скачивания и установки.

Обычно так и происходит, но иногда можно увидеть подобную ошибку:

Failed to download repository information. Check your internet connection

Скорее всего ошибка покажется странной, так как интернет работает, но вас все равно просят его проверить.

Заметили, что я назвал ее “Ошибка 0”? Это потому что это по сути не ошибка. То есть, скорее всего, она не связана с подключением к интернету. Тем не менее помимо этого путающего сообщения больше информации нет.

Если вы видите данное сообщение, а подключение к интернету в порядке, то значит пришло время надевать шляпу детектива и пошевелить мозгами.

Нам придется использовать командную строку. Для того чтобы ее быстро открыть можете воспользоваться сочетанием клавиш ctrl+alt+T. Исполните в ней данную команду:

sudo apt update

Дождитесь завершения процесса. Рассмотрите последние 3-4 строки вывода. Они покажут действительные причины ошибки sudo apt-get update. Вот пример:

Дальше туториал будет посвящен способам решения ошибок, указанных в нескольких последних строчках вывода командной строки.

Ошибка 1: Problem With MergeList

Когда вы запустите обновление в терминале, то можете увидеть ошибку “Problem With MergeList”:

E:Encountered a section with no Package: header,
E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise_universe_binary-i386_Packages,
E:The package lists or status file could not be parsed or opened.’

По какой-то причине файл в директории /var/lib/apt/lists сломался. Вы можете удалить все файлы в указанной директории и запустить обновление снова. Исполните указанные команды одна за другое:

sudo rm -r /var/lib/apt/lists/*
sudo apt-get clean && sudo apt-get update

Проблемы должны исчезнуть

Ошибка 2: Hash Sum mismatch

Вы можете встретиться с ошибкой “Hash Sum mismatch”. Ее решение аналогично тому, что мы написали выше.

W:Failed to fetch bzip2:/var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_oneiric_restricted_binary-i386_Packages Hash Sum mismatch,
W:Failed to fetch bzip2:/var/lib/apt/lists/partial/in.archive.ubuntu.com_ubuntu_dists_oneiric_multiverse_binary-i386_Packages Hash Sum mismatch,
E:Some index files failed to download. They have been ignored, or old ones used instead

Скорее всего ошибка происходит из-за несовпадения на серверах кэша метаданных. Для исправления ситуации используйте данные команды:

sudo rm -rf /var/lib/apt/lists/*
sudo apt update

Ошибка 3: Failed to fetch with error 404 not found

Если вы попытаетесь добавить репозиторий, который недоступен в вашей текущей версии Ubuntu, то увидите ошибку 404 not found:

W: Failed to fetch http://ppa.launchpad.net/venerix/pkg/ubuntu/dists/raring/main/binary-i386/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

Вы добавили PPA в надежде установить приложение, но оно недоступно для вашей версии Ubuntu, и появилась ошибка. Вот почему следует заранее проверять доступно ли PPA для вашей версии Ubuntu или нет. Как удостовериться, что для вашей версии есть PPA, можно посмотреть здесь.

Так или иначе решением данной проблемы является удаление проблемной PPA из списка репозиториев. Название PPA вы найдете в сообщении об ошибке. Зайдите в средство Software & Updates:

Откройте Software & Updates

Здесь пройдите во вкладку Other Software и поищите PPA. Уберите галочку, чтобы PPA удалилась из системы.

Удалите PPA с помощью Software & Updates

Ваш список программ после этого обновится. Теперь, если вы снова запустите обновление, ошибка исчезнет.

Ошибка 4: Failed to download package files

Failed to download package files

В данной ситуации доступна новая версия программы, но эта версия не распространена на все зеркала. Если вы не используете зеркало, то решить эту проблему просто — сделайте источником программы основной сервер.

Пройдите в Software & Updates там измените сменить сервер с которого происходит скачивание на main (основной):

Ошибка 5: GPG error: The following signatures couldn’t be verified

Добавление PPA может также привести к оповещению “GPG error: The following signatures couldn’t be verified” во время обновления:

W: GPG error: http://repo.mate-desktop.org saucy InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 68980A0EA10B4DE8

Все что надо в данном случае сделать, так это добавить публичный код в систему. Возьмите ключ из сообщения. В сообщении выше это 68980A0EA10B4DE8.

Данный ключ можно использовать так:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 68980A0EA10B4DE8

Как только ключ будет добавлен, запустите обновление и все должны быть в порядке.

Ошибка 6: BADSIG error

Еще одна знаковая ошибка при обновлении Ubuntu — это “BADSIG error”, которая выглядит примерно так:

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key
W: GPG error: http://ppa.launchpad.net precise Release:
The following signatures were invalid: BADSIG 4C1CBC1B69B0E2F4 Launchpad PPA for Jonathan French W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/precise/Release

Все репозитории подписаны GPG, и по какой-то причине система считает их неверными. Необходимо обновить ключи подписей. Проще всего это сделать путем повторной генерации списка apt get (с ключами подписей) и он должен иметь верный ключ.

Используйте следующие команды одну за другой:

cd /var/lib/apt
sudo mv lists oldlist
sudo mkdir -p lists/partial
sudo apt-get clean
sudo apt-get update

Ошибка 7: Partial upgrade error

Обновление через терминал может привести к такому:

Not all updates can be installed
Run a partial upgrade, to install as many updates as possible

Для исправления ошибки исполните в терминале данную команду:

sudo apt-get install -f

Ошибка 8: Could not get lock /var/cache/apt/archives/lock

Данная ошибка происходит, когда еще одна программа использует APT. Допустим вы устанавливаете что-то через Ubuntu Software Center и в одновременно пытается запустить apt в терминале.

E: Could not get lock /var/cache/apt/archives/lock – open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/cache/apt/archives/

Проверьте не использует ли apt другая программа. Это может быть команда в терминале, Software Center, Software Updater, Software & Updates или иной другой соф, который занимается установкой и удалением приложений.

Если можете такие программы закрыть, закрывайте. Если что-то в процессе, то дождитесь завершения.

Если ничего найти не можете, используйте данную команду для того, чтобы прекратить все подобные процессы:

sudo killall apt apt-get

Это хитрая проблема, так что придется попотеть. Если это не поможет, то рекомендуем эту статью.

Встречали ли вы другие ошибки при обновлении?

Так завершается обзор часто встречающихся ошибок при обновлении Ubuntu. Надеюсь данная статья поможет вам с ними справится.

Вы не встречали других ошибок при обновлении Ubuntu недавно, о которых здесь не говорится? Расскажите в комментариях.

Just installed Ubuntu 13.10 (Saucy) and anything I try to install via sudo apt-get install is failing and throwing a series of 404 erros.

Example — installing tmux

[jeeves@HAL] hadoop > sudo apt-get install tmux
[sudo] password for jeeves: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  tmux
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 247 kB of archives.
After this operation, 577 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  tmux
Install these packages without verification [y/N]? Y
Err http://us.archive.ubuntu.com/ubuntu/ saucy/main tmux amd64 1.8-4
  404  Not Found [IP: 91.189.91.23 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/t/tmux/tmux_1.8-4_amd64.deb  404  Not Found [IP: 91.189.91.23 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

In this case it can’t fetch an archive URL.

I get something similar when installing mysql-server

....
Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/m/mysql-5.5/mysql-common_5.5.37-0ubuntu0.13.10.1_all.deb  404  Not Found [IP: 91.189.91.23 80]
Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/m/mysql-5.5/libmysqlclient18_5.5.37-0ubuntu0.13.10.1_amd64.deb  404  Not Found [IP: 91.189.91.23 80]
Failed to fetch http://us.archive.ubuntu.com/ubuntu/pool/main/libd/libdbi-perl/libdbi-perl_1.627-1_amd64.deb  404  Not Found [IP: 91.189.91.15 80]
....

… and numerous other packages.

I even tried sudo apt-get update and running with --fix-missing?

Is the Ubuntu repository just down (which seems odd given how many people rely on it) or did I miss something?

EDIT: Here’s what happens when I try sudo apt-get update. The update itself doesn’t work because of resources that can’t be found

> sudo apt-get update
Hit http://download.virtualbox.org maverick InRelease
Ign http://us.archive.ubuntu.com saucy InRelease                                                
Ign http://us.archive.ubuntu.com saucy-updates InRelease                                        
Ign http://extras.ubuntu.com saucy InRelease                                                  
Ign http://us.archive.ubuntu.com saucy-backports InRelease           
Hit http://download.virtualbox.org maverick/contrib amd64 Packages   
Hit http://download.virtualbox.org maverick/non-free amd64 Packages  
Ign http://us.archive.ubuntu.com saucy Release.gpg                   
Hit http://extras.ubuntu.com saucy Release.gpg                       
Hit http://download.virtualbox.org maverick/contrib i386 Packages    
Ign http://us.archive.ubuntu.com saucy-updates Release.gpg                                       
Hit http://download.virtualbox.org maverick/non-free i386 Packages                               
Ign http://us.archive.ubuntu.com saucy-backports Release.gpg                                     
Ign http://us.archive.ubuntu.com saucy Release                                                   
Ign http://security.ubuntu.com saucy-security InRelease                                          
Hit http://extras.ubuntu.com saucy Release                           
Ign http://us.archive.ubuntu.com saucy-updates Release                                      
Ign http://security.ubuntu.com saucy-security Release.gpg                                   
Ign http://us.archive.ubuntu.com saucy-backports Release             
Ign http://security.ubuntu.com saucy-security Release                
Hit http://extras.ubuntu.com saucy/main Sources                      
Ign http://us.archive.ubuntu.com saucy/main Sources/DiffIndex        
Ign http://security.ubuntu.com saucy-security/main Sources/DiffIndex 
Ign http://us.archive.ubuntu.com saucy/restricted Sources/DiffIndex  
Ign http://security.ubuntu.com saucy-security/restricted Sources/DiffIndex
Hit http://extras.ubuntu.com saucy/main amd64 Packages               
Ign http://us.archive.ubuntu.com saucy/universe Sources/DiffIndex    
Ign http://security.ubuntu.com saucy-security/universe Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy/multiverse Sources/DiffIndex  
Hit http://extras.ubuntu.com saucy/main i386 Packages                
Ign http://security.ubuntu.com saucy-security/multiverse Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy/main amd64 Packages/DiffIndex 
Ign http://security.ubuntu.com saucy-security/main amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy/restricted amd64 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/restricted amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy/universe amd64 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/universe amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy/multiverse amd64 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/multiverse amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy/main i386 Packages/DiffIndex  
Ign http://download.virtualbox.org maverick/contrib Translation-en_US
Ign http://security.ubuntu.com saucy-security/main i386 Packages/DiffIndex
Ign http://download.virtualbox.org maverick/contrib Translation-en   
Ign http://us.archive.ubuntu.com saucy/restricted i386 Packages/DiffIndex
Ign http://download.virtualbox.org maverick/non-free Translation-en_US
Ign http://download.virtualbox.org maverick/non-free Translation-en  
Ign http://us.archive.ubuntu.com saucy/universe i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy/multiverse i386 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/restricted i386 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/universe i386 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/multiverse i386 Packages/DiffIndex
Ign http://extras.ubuntu.com saucy/main Translation-en_US
Ign http://extras.ubuntu.com saucy/main Translation-en
Ign http://us.archive.ubuntu.com saucy-updates/main Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/restricted Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/universe Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/multiverse Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/main amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/restricted amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/universe amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/multiverse amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/main i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/restricted i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/universe i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-updates/multiverse i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/main Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/restricted Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/universe Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/multiverse Sources/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/main amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/restricted amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/universe amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/multiverse amd64 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/main i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/restricted i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/universe i386 Packages/DiffIndex
Ign http://us.archive.ubuntu.com saucy-backports/multiverse i386 Packages/DiffIndex
Ign http://security.ubuntu.com saucy-security/main Translation-en_US
Ign http://security.ubuntu.com saucy-security/main Translation-en
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en_US
Ign http://security.ubuntu.com saucy-security/multiverse Translation-en
Ign http://security.ubuntu.com saucy-security/restricted Translation-en_US
Ign http://security.ubuntu.com saucy-security/restricted Translation-en
Ign http://security.ubuntu.com saucy-security/universe Translation-en_US
Ign http://security.ubuntu.com saucy-security/universe Translation-en
Err http://security.ubuntu.com saucy-security/main Sources
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/restricted Sources
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/universe Sources
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/multiverse Sources
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/main amd64 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/restricted amd64 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/universe amd64 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/multiverse amd64 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/main i386 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/restricted i386 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/universe i386 Packages
  404  Not Found [IP: 91.189.91.23 80]
Err http://security.ubuntu.com saucy-security/multiverse i386 Packages
  404  Not Found [IP: 91.189.91.23 80]
Ign http://us.archive.ubuntu.com saucy/main Translation-en_US
Ign http://us.archive.ubuntu.com saucy/main Translation-en
Ign http://us.archive.ubuntu.com saucy/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com saucy/multiverse Translation-en
Ign http://us.archive.ubuntu.com saucy/restricted Translation-en_US
Ign http://us.archive.ubuntu.com saucy/restricted Translation-en
Ign http://us.archive.ubuntu.com saucy/universe Translation-en_US
Ign http://us.archive.ubuntu.com saucy/universe Translation-en
Ign http://us.archive.ubuntu.com saucy-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com saucy-updates/main Translation-en
Ign http://us.archive.ubuntu.com saucy-updates/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com saucy-updates/multiverse Translation-en
Ign http://us.archive.ubuntu.com saucy-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com saucy-updates/restricted Translation-en
Ign http://us.archive.ubuntu.com saucy-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com saucy-updates/universe Translation-en
Ign http://us.archive.ubuntu.com saucy-backports/main Translation-en_US
Ign http://us.archive.ubuntu.com saucy-backports/main Translation-en
Ign http://us.archive.ubuntu.com saucy-backports/multiverse Translation-en_US
Ign http://us.archive.ubuntu.com saucy-backports/multiverse Translation-en
Ign http://us.archive.ubuntu.com saucy-backports/restricted Translation-en_US
Ign http://us.archive.ubuntu.com saucy-backports/restricted Translation-en
Ign http://us.archive.ubuntu.com saucy-backports/universe Translation-en_US
Ign http://us.archive.ubuntu.com saucy-backports/universe Translation-en
Err http://us.archive.ubuntu.com saucy/main Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/restricted Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/universe Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/multiverse Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/main amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/restricted amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/universe amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/multiverse amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/main i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/restricted i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/universe i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy/multiverse i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/main Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/restricted Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/universe Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/multiverse Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/main amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/restricted amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/universe amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/multiverse amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/main i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/restricted i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/universe i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-updates/multiverse i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/main Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/restricted Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/universe Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/multiverse Sources
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/main amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/restricted amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/universe amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/multiverse amd64 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/main i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/restricted i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/universe i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
Err http://us.archive.ubuntu.com saucy-backports/multiverse i386 Packages
  404  Not Found [IP: 91.189.91.24 80]
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/main/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/source/Sources  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/restricted/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/source/Sources  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/universe/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/source/Sources  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/source/Sources  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/saucy-security/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.23 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-updates/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/source/Sources  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/saucy-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.24 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

Running the sudo apt-get update command, I got the following error:

Fetched 988 kB in 16s (59,3 kB/s)                                              
W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/restricted/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/universe/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/multiverse/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-updates/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/restricted/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/multiverse/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/main/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/restricted/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/universe/binary-i386/Packages  404  Not Found

W: Failed to fetch http://old-releases.ubuntu.com/ubuntu/dists/trusty-security/multiverse/binary-i386/Packages  404  Not Found

W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/rebecca-getdeb/apps/binary-amd64/Packages  404  Not Found [IP: 104.28.24.125 80]

W: Failed to fetch http://archive.getdeb.net/ubuntu/dists/rebecca-getdeb/apps/binary-i386/Packages  404  Not Found [IP: 104.28.24.125 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.

I know that to solve this kind of errors, I have to modify the sudo gedit /etc/apt/sources.list , but, in this case, I found only those:

#deb cdrom:[Linux Mint 17.1 _Rebecca_ - Release amd64 20141126]/ trusty contrib main non-free
deb http://download.virtualbox.org/virtualbox/debian trusty contrib
deb http://cran.cnr.berkeley.edu/bin/linux/ubuntu/ trusty/

/etc/apt/source.list.d is empty. sudo apt-cache policy gives:

Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://ppa.launchpad.net/ubuntuhandbook1/apps/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/ubuntuhandbook1/apps/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-ubuntuhandbook1-apps,a=trusty,n=trusty,l=Apps,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/ubuntuhandbook1/apps/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-ubuntuhandbook1-apps,a=trusty,n=trusty,l=Apps,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-ubuntu-wine,a=trusty,n=trusty,l=Wine Team PPA,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-ubuntu-wine,a=trusty,n=trusty,l=Wine Team PPA,c=main
     origin ppa.launchpad.net
 500 http://deb.playonlinux.com/ saucy/main i386 Packages
     release v=13.10,o=PlayOnLinux,a=saucy,n=saucy,l=PoL,c=main
     origin deb.playonlinux.com
 500 http://deb.playonlinux.com/ saucy/main amd64 Packages
     release v=13.10,o=PlayOnLinux,a=saucy,n=saucy,l=PoL,c=main
     origin deb.playonlinux.com
 500 http://archive.canonical.com/ubuntu/ trusty/partner Translation-en
 500 http://archive.canonical.com/ubuntu/ trusty/partner i386 Packages
     release v=14.04,o=Canonical,a=trusty,n=trusty,l=Partner archive,c=partner
     origin archive.canonical.com
 500 http://archive.canonical.com/ubuntu/ trusty/partner amd64 Packages
     release v=14.04,o=Canonical,a=trusty,n=trusty,l=Partner archive,c=partner
     origin archive.canonical.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/universe Translation-en
 500 http://security.ubuntu.com/ubuntu/ trusty-security/restricted Translation-en
 500 http://security.ubuntu.com/ubuntu/ trusty-security/multiverse Translation-en
 500 http://security.ubuntu.com/ubuntu/ trusty-security/main Translation-en
 500 http://security.ubuntu.com/ubuntu/ trusty-security/multiverse i386 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=multiverse
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/universe i386 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=universe
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/restricted i386 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=restricted
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/main i386 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=main
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/multiverse amd64 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=multiverse
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/universe amd64 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=universe
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/restricted amd64 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=restricted
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     release v=14.04,o=Ubuntu,a=trusty-security,n=trusty,l=Ubuntu,c=main
     origin security.ubuntu.com
 700 http://extra.linuxmint.com/ rebecca/main i386 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=main
     origin extra.linuxmint.com
 700 http://extra.linuxmint.com/ rebecca/main amd64 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=main
     origin extra.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/import i386 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=import
     origin packages.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/upstream i386 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=upstream
     origin packages.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/main i386 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=main
     origin packages.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/import amd64 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=import
     origin packages.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/upstream amd64 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=upstream
     origin packages.linuxmint.com
 700 http://packages.linuxmint.com/ rebecca/main amd64 Packages
     release v=17.1,o=linuxmint,a=rebecca,n=rebecca,l=linuxmint,c=main
     origin packages.linuxmint.com
 500 http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-notepadqq-team-notepadqq,a=trusty,n=trusty,l=Notepadqq,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-notepadqq-team-notepadqq,a=trusty,n=trusty,l=Notepadqq,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/noobslab/themes/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/noobslab/themes/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-noobslab-themes,a=trusty,n=trusty,l=Themes Collection by NoobsLab,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/noobslab/themes/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-noobslab-themes,a=trusty,n=trusty,l=Themes Collection by NoobsLab,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/moka/stable/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/moka/stable/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-moka-stable,a=trusty,n=trusty,l=Moka Stable,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/moka/stable/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-moka-stable,a=trusty,n=trusty,l=Moka Stable,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/lyx-devel/release/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/lyx-devel/release/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-lyx-devel-release,a=trusty,n=trusty,l=LyX PPA (release),c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/lyx-devel/release/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-lyx-devel-release,a=trusty,n=trusty,l=LyX PPA (release),c=main
     origin ppa.launchpad.net
 500 http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages
     release v=1.0,o=Google, Inc.,a=stable,n=stable,l=Google,c=main
     origin dl.google.com
 500 http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages
     release v=1.0,o=Google, Inc.,a=stable,n=stable,l=Google,c=main
     origin dl.google.com
 500 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-gezakovacs,a=trusty,n=trusty,l=UNetbootin PPA,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/gezakovacs/ppa/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-gezakovacs,a=trusty,n=trusty,l=UNetbootin PPA,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/fossfreedom/rhythmbox/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/fossfreedom/rhythmbox/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-fossfreedom-rhythmbox,a=trusty,n=trusty,l=Rhythmbox,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/fossfreedom/rhythmbox/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-fossfreedom-rhythmbox,a=trusty,n=trusty,l=Rhythmbox,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/costales/folder-color/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/costales/folder-color/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-costales-folder-color,a=trusty,n=trusty,l=Folder Color,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/costales/folder-color/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-costales-folder-color,a=trusty,n=trusty,l=Folder Color,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/atareao/telegram/ubuntu/ trusty/main Translation-en
 500 http://ppa.launchpad.net/atareao/telegram/ubuntu/ trusty/main i386 Packages
     release v=14.04,o=LP-PPA-atareao-telegram,a=trusty,n=trusty,l=Telegram,c=main
     origin ppa.launchpad.net
 500 http://ppa.launchpad.net/atareao/telegram/ubuntu/ trusty/main amd64 Packages
     release v=14.04,o=LP-PPA-atareao-telegram,a=trusty,n=trusty,l=Telegram,c=main
     origin ppa.launchpad.net
 500 http://repository.spotify.com/ stable/non-free i386 Packages
     origin repository.spotify.com
 500 http://repository.spotify.com/ stable/non-free amd64 Packages
     origin repository.spotify.com
 500 http://cran.cnr.berkeley.edu/bin/linux/ubuntu/ trusty/ Packages
     release v=14.04,o=CRAN,a=trusty,n=trusty,l=CRAN,c=
     origin cran.cnr.berkeley.edu
 700 http://download.virtualbox.org/virtualbox/debian/ quantal/contrib i386 Packages
     origin download.virtualbox.org
 700 http://download.virtualbox.org/virtualbox/debian/ quantal/contrib amd64 Packages
     origin download.virtualbox.org
Pinned packages:

Running the command inxi -r I get:

Active apt sources in file: /etc/apt/sources.list
           deb http://download.virtualbox.org/virtualbox/debian trusty contrib
           deb http://cran.cnr.berkeley.edu/bin/linux/ubuntu/ trusty/
           Active apt sources in file: /etc/apt/sources.list.d/additional-repositories.list
           deb http://repository.spotify.com stable non-free
           Active apt sources in file: /etc/apt/sources.list.d/atareao-telegram-trusty.list
           deb http://ppa.launchpad.net/atareao/telegram/ubuntu trusty main
           deb-src http://ppa.launchpad.net/atareao/telegram/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/costales-folder-color-trusty.list
           deb http://ppa.launchpad.net/costales/folder-color/ubuntu trusty main
           deb-src http://ppa.launchpad.net/costales/folder-color/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/fossfreedom-rhythmbox-trusty.list
           deb http://ppa.launchpad.net/fossfreedom/rhythmbox/ubuntu trusty main
           deb-src http://ppa.launchpad.net/fossfreedom/rhythmbox/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/getdeb.list
           deb http://archive.getdeb.net/ubuntu rebecca-getdeb apps
           Active apt sources in file: /etc/apt/sources.list.d/gezakovacs-ppa-trusty.list
           deb http://ppa.launchpad.net/gezakovacs/ppa/ubuntu trusty main
           deb-src http://ppa.launchpad.net/gezakovacs/ppa/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/google-chrome.list
           deb http://dl.google.com/linux/chrome/deb/ stable main
           Active apt sources in file: /etc/apt/sources.list.d/lyx-devel-release-trusty.list
           deb http://ppa.launchpad.net/lyx-devel/release/ubuntu trusty main
           deb-src http://ppa.launchpad.net/lyx-devel/release/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/moka-stable-trusty.list
           deb http://ppa.launchpad.net/moka/stable/ubuntu trusty main
           deb-src http://ppa.launchpad.net/moka/stable/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/noobslab-themes-trusty.list
           deb http://ppa.launchpad.net/noobslab/themes/ubuntu trusty main
           deb-src http://ppa.launchpad.net/noobslab/themes/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/notepadqq-team-notepadqq-trusty.list
           deb http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu trusty main
           deb-src http://ppa.launchpad.net/notepadqq-team/notepadqq/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/official-package-repositories.list
           deb http://packages.linuxmint.com rebecca main upstream import
           deb http://extra.linuxmint.com rebecca main
           deb http://old-releases.ubuntu.com/ubuntu trusty main restricted universe multiverse
           deb http://old-releases.ubuntu.com/ubuntu trusty-updates main restricted universe multiverse
           deb http://old-releases.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse
           deb http://archive.canonical.com/ubuntu/ trusty partner
           Active apt sources in file: /etc/apt/sources.list.d/playonlinux.list
           deb http://deb.playonlinux.com/ saucy main
           Active apt sources in file: /etc/apt/sources.list.d/ubuntu-wine-ppa-trusty.list
           deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu trusty main
           deb-src http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu trusty main
           Active apt sources in file: /etc/apt/sources.list.d/ubuntuhandbook1-apps-trusty.list
           deb http://ppa.launchpad.net/ubuntuhandbook1/apps/ubuntu trusty main
           deb-src http://ppa.launchpad.net/ubuntuhandbook1/apps/ubuntu trusty main

Running cd /etc/apt/sources.list.d and ls -la I get:

total 60
4 -rw-r--r-- 1 root root  50 Apr  5 21:26 additional-repositories.list
4 -rw-r--r-- 1 root root 134 Mar 21 19:59 atareao-telegram-trusty.list
4 -rw-r--r-- 1 root root 144 Apr  4 11:18 costales-folder-color-trusty.list
4 -rw-r--r-- 1 root root 144 Mar 27 14:10 fossfreedom-rhythmbox-trusty.list
4 -rw-r--r-- 1 root root  57 May  1 02:23 getdeb.list
4 -rw-r--r-- 1 root root 130 Apr  2 14:31 gezakovacs-ppa-trusty.list
4 -rw-r--r-- 1 root root 176 Apr  5 21:26 google-chrome.list
4 -rw-r--r-- 1 root root 136 Mar 25 23:04 lyx-devel-release-trusty.list
4 -rw-r--r-- 1 root root 124 Mar 23 02:27 moka-stable-trusty.list
4 -rw-r--r-- 1 root root 132 Mar 23 13:43 noobslab-themes-trusty.list
4 -rw-r--r-- 1 root root 150 Apr  6 21:43 notepadqq-team-notepadqq-trusty.list
4 -rw-r--r-- 1 root root 470 May  1 22:55 official-package-repositories.list
4 -rw-r--r-- 1 root root  43 Feb 27 22:06 playonlinux.list
4 -rw-r--r-- 1 root root 142 Mar 23 22:44 ubuntuhandbook1-apps-trusty.list
4 -rw-r--r-- 1 root root 132 Apr 14 00:34 ubuntu-wine-ppa-trusty.list

Can someone suggest a solution?

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