Ubuntu: Ubuntu 14.04.5 update issue - Unable to find expected entry 'restricted/source/Sources' in Release file



Question:

I have just installed Ubuntu 14.04.5 LTS in my laptop. After installing I found my sources.list got corrupted.

 $ sudo apt-get update     output:    .......    .......   W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/trusty/Release  Unable to find expected entry 'restricted/source/Sources' in Release file (Wrong sources.list entry or malformed file)   E: Some index files failed to download. They have been ignored, or old ones used instead.  

My sources.list file:

#deb cdrom:[Ubuntu 14.04.5 LTS _Trusty Tahr_ - Release amd64 (20160803)]/ trusty main restricted    # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to  # newer versions of the distribution.  deb http://in.archive.ubuntu.com/ubuntu/ trusty main restricted  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty main restricted    ## Major bug fix updates produced after the final release of the  ## distribution.  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates main restricted  deb-src http://in.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://in.archive.ubuntu.com/ubuntu/ trusty universe  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty universe  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates universe  deb-src http://in.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://in.archive.ubuntu.com/ubuntu/ trusty multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty multiverse  deb http://in.archive.ubuntu.com/ubuntu/ trusty-updates multiverse  deb-src http://in.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://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse  deb-src http://in.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse    deb http://security.ubuntu.com/ubuntu trusty-security main restricted  deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted  deb http://security.ubuntu.com/ubuntu trusty-security universe  deb-src http://security.ubuntu.com/ubuntu trusty-security universe  deb http://security.ubuntu.com/ubuntu trusty-security multiverse  deb-src http://security.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  

Please can anybody tell me how to fix this? I tried deleting sources.list file and generate again but did not work.


Solution:1

Try removing apt lists:

sudo rm /var/lib/apt/lists/*   

then:

sudo apt update  

It should do the job.


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