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When I run sudo apt-get update, I receive this error message: 

W: The repository 'http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu yakkety Release' does not have a Release file.  
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.  
N: See apt-secure(8) manpage for repository creation and user configuration details.  
E: Failed to fetch http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/dists/yakkety/main/binary-amd64/Packages  404  Not Found  
E: Some index files failed to download. They have been ignored, or old ones used instead.

Due to this error I can not install any application, please help me in detail, I am very new to Linux.

cl-netbox
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Moeed Azhar
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1 Answers1

8

Open Software & Updates -> Other Software -> mark the wine repository -> click on Remove.
In case that there is more than one entry for wine, remove the other one (Source Code) as well.

enter image description here

In the screenshot you see my repositories and in this example the LXD repo would get removed.
When you run sudo apt update or sudo apt-get update now, it will succeed without an error.

Update addressing your comment that you are not able to install vlc packages ... even though not asked in the original question, the packages are available in the Ubuntu universe repository. 

$ apt policy vlc
vlc:
  Installed: 2.2.4-4ubuntu0.16.10.1
  Candidate: 2.2.4-4ubuntu0.16.10.1
  Version table:
 *** 2.2.4-4ubuntu0.16.10.1 500
        500 http://archive.ubuntu.com/ubuntu yakkety-updates/universe amd64 Packages
        100 /var/lib/dpkg/status
     2.2.4-4 500
        500 http://archive.ubuntu.com/ubuntu yakkety/universe amd64 Packages

Make sure that all official Ubuntu repositories are enabled as it's shown in the screenshot below :

enter image description here

After having enabled all repositories and running sudo apt update, you are able to install vlc.

cl-netbox
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  • Ok fine and nice answer by the way but my problem is still unsolved as i try to install vlc by using this command sudo apt-get install vlc browser-plugin-vlc I got these errors E: Unable to locate package vlc E: Unable to locate package browser-plugin-vlc – Moeed Azhar Feb 27 '17 at 17:12
  • @MoeedAzhar your question did not mention VLC. cl-netbox gave an excellent, understandable answer to the question you asked. That you asked the wrong question is not relevant. You should accept this answer, and open a new question with your REAL question. – user535733 Feb 27 '17 at 19:35