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I am getting following error while updating with:

sudo apt-get update

at the bottom and even i cant able to update or add repository in software and updates.

E:The repository 'cdrom://Ubuntu-GNOME 17.04 _Zesty Zapus_ - Release amd64 (20170412) zesty Release' does not have a Release file.,
W:Updating from such a repository can't be done securely, and is therefore disabled by default., 
W:See apt-secure(8) manpage for repository creation and user configuration details., 
E:The repository 'http ://deb. torproject.org/torproject.org <DISTRIBUTION> Release' does not have a Release file., 
W:Updating from such a repository can't be done securely, and is therefore disabled by default., 
W:See apt-secure(8) manpage for repository creation and user configuration details., 
E:The repository 'http ://ppa.launchpad.net/damien-moore/codeblocks-stable/ubuntu zesty Release' does not have a Release file., 
W:Updating from such a repository can't be done securely, and is therefore disabled by default., 
W:See apt-secure(8) manpage for repository creation and user configuration details., 
E:The repository 'http ://ppa.launchpad.net/fkrull/deadsnakes/ubuntu zesty Release' does not have a Release file., 
W:Updating from such a repository can't be done securely, and is therefore disabled by default., 
W:See apt-secure(8) manpage for repository creation and user configuration details., 
E:The repository 'http://ppa.launchpad.net/trebelnik-stefina/myppa/ubuntu zesty Release' does not have a Release file.
George Udosen
  • 36,677
cs.15.1007
  • 1

1 Answers1

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It appears you have certain repositories that don't have zesty releases, so got to System Settings --> Software & Updates --> Other Software and look for and uncheck those repositories. On closing you will be asked to update you repo information, similar to doing sudo apt update or sudo apt-get update.

enter image description here

George Udosen
  • 36,677