Repository does not have a release file error

Question

I m trying to install ROS on Ubuntu  I m getting this error      sudo apt-get update Hit 1 http   pk archive ubuntu com ubuntu cosmic InRelease     Hit 2 http   pk archive ubuntu com ubuntu cosmic-updates InRelease     Hit 3 http   pk archive ubuntu com ubuntu cosmic-backports InRelease     Get 4 http   security ubuntu com ubuntu cosmic-security InRelease  83 2 kB      Ign 5 http   packages ros org ros ubuntu cosmic InRelease Err 6 http   packages ros org ros ubuntu cosmic Release 404 Not Found  IP  64 50 236 52 80  Reading package lists    Done     E  The repository  http   packages ros org ros ubuntu cosmic Release  does not have a Release file  N  Updating from such a repository can t be done securely  and is therefore disabled by default  N  See apt-secure 8  manpage for repository creation and user configuration details

User · Answer

As described here  you need to edit  as root  the file  etc apt sources list  the easiest way to do this is to type sudo gedit  etc apt sources list   On the line that mentions http   packages ros org ros ubuntu you need to add  trusted yes  after the word deb  you might need to add it as a separate word   Then save the file and try again

User · Answer

If a sudo apt-get update did not do it for you  it might be that some packages have failed to updated to repository-related errors  For me all of those happened to reside in  Software Updates -- gt  Other Software   You could remove them with  quot Remove quot   the cache will be refreshed successfully  Otherwise sudo apt-get clean apt-get autoremove   is something to try

User · Answer

In my case the cause was Ubuntu version no longer supported by Canonical  I was able to upgrade to still supported LTS with 2 steps   1  Manually update repo links from  in ubuntu  to  old-releases ubuntu   1 1  Installed all outstanding updates 2  do-release-upgrade was able to take from this point and do actual upgrade  IMHO  this is safer method then just updating repositories to next supported ubuntu  since do-release-upgrade have chance to prevent upgrade that could fail  and may be able to diagnose a problem for you

User · Answer

You need to update your repository targets to the Eoan Ermine  19 10  release of Ubuntu  This can be done like so   sudo sed -i -e  s disco eoan g   etc apt sources list sudo apt update

User · Answer

Make sure your  etc apt sources list has http   old-releases ubuntu com instead of in archive

User · Answer

I opened up my Software  amp  Updates program and switched from my country to the main servers like so    After I done this and run the sudo apt update commando again  my problems where gone

User · Answer

im use this code to and suggest you   1  sudo sed -i -e  s disco eoan g   etc apt sources list 2  sudo apt update

User · Answer

This problem is probably from your  etc apt sources list as others mentioned but there is chance that  the problem is with your hard disk  I solved the same issue by cleaning up some space   When you don t have enough space on your hard disk  updating your machine won t occur until you delete some files

User · Answer

For Unable to  apt update  my Ubuntu 19 04 The repositories for older releases that are not supported  like 11 04  11 10 and 13 04  get moved to an archive server  There are repositories available at http   old-releases ubuntu com  first break up this file cp   etc apt sources list  etc apt sources list bak sudo sed -i -re  s   a-z  2    archive ubuntu com security ubuntu com old-releases ubuntu com g   etc apt sources list then sudo apt-get update  amp  amp  sudo apt-get dist-upgrade

User · Answer

I have been having this issue for a couple of weeks and finally decided to sit down and try and fix it   I have no interest in config file editing as I m primarily a Windows user   In a fit of  clickyness  I noticed that the ubuntu server location was set  for United kingdom    I switched this over to  Main Server  and hey presto    it all stared updating     So  it seems like the regionalised server  for the UK at least  has a very limited support window so if you are an infrequent user it is likely it will not have a valid upgrade path from your current version to the latest   Edit  I only just noticted the previous reply  after posting   100  agree

[ubuntu] "Repository does not have a release file" error

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