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Yesterday everything was fine and sudo apt-get update worked fine but today it's not working it just say cannot connect to different websites.
Then I tried changing the server in software and updates , it couldn't find even a single server to connect.
Browsers work fine also ping google.com work fine but ping6 google.com doesn't work.
I'm using ubuntu 14.04
Thanks in advance !


UPDATE :
Here is my sources.list :

# deb cdrom:[Ubuntu 14.04.6 LTS _Trusty Tahr_ - Release amd64 (20190304.5)]/ trusty main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://archive.ubuntu.com/ubuntu trusty main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://archive.ubuntu.com/ubuntu trusty-updates main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu trusty universe
deb-src http://archive.ubuntu.com/ubuntu trusty universe
deb http://archive.ubuntu.com/ubuntu trusty-updates universe
deb-src http://archive.ubuntu.com/ubuntu trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://archive.ubuntu.com/ubuntu trusty multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty multiverse
deb http://archive.ubuntu.com/ubuntu trusty-updates multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb-src http://archive.ubuntu.com/ubuntu trusty-security main restricted
deb http://archive.ubuntu.com/ubuntu trusty-security universe
deb-src http://archive.ubuntu.com/ubuntu trusty-security universe
deb http://archive.ubuntu.com/ubuntu trusty-security multiverse
deb-src http://archive.ubuntu.com/ubuntu trusty-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
# deb http://extras.ubuntu.com/ubuntu trusty main
# deb-src http://extras.ubuntu.com/ubuntu trusty main
deb http://archive.ubuntu.com/ubuntu trusty-proposed restricted universe main multiverse
  • Can you please provide pictures & output of errors that you've encountered and sources.list file. What is your server selection in Software & Updates ? – Ugur Akgul Jul 10 at 8:37
  • Ubuntu 14.04 LTS is EOL, after EOL many mirrors drop the archives, and the main archive will move to old-releases. It's also off-topic here. If you are using Ubuntu 14.04 ESM which is still supported by Canonical, use your Ubuntu Advantage support as it's off-topic here. – guiverc Jul 10 at 8:40
  • ps: when this occurs is defined only as 'after EOL' (end-of-life) so it was expected anytime after April 2019 (14.04 or 2014-April + 5 years), and not all mirrors will 'drop' the EOL release at the same time. – guiverc Jul 10 at 8:48
  • @UgurAkgul Here is an example of errors : Err extras.ubuntu.com trusty Release.gpg Cannot initiate the connection to extras.ubuntu.com:80 (MY-IP6::29). - connect (101: Network is unreachable) [IP:MY-IP6 80] – Newbie14 Jul 10 at 10:20
  • @UgurAkgul In new post Update I provide sources.list info – Newbie14 Jul 10 at 10:26
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Go to software and updates Select Other Software uncheck all ppas click close click reload

Go to Lite Welcome

Good luck!

  • It worked just fine ! Thanks – Newbie14 Jul 10 at 10:37

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