Why can't I update the apt Its because don't have a Virtual Box release file?
65
What can I do if a repository/PPA does not have a Release file?
13107
How to install updates via command line?
155918
What information do I need to solve an APT dependency issue?
44209
Problem with update-manager: No module named 'apt_pkg' in Ubuntu 13.10, having installed Python 3.4 on /usr/local/lib
29362
How do I install a single package from Debian testing or unstable on stable?
64509
Can't update from official repositories [Error 409]
4450
How can I reproduce the error "package... needs to be reinstalled, but I can't find an archive for it" for testing?
1789
How to install Ubuntu on VirtualBox?
54571
How do I install the latest version of Git with apt?
63320
Ubuntu repository does not have a Release file
100494
Update Manager asking me to update kernel but apt-get upgrade does not?
16578
How to upgrade a single package using apt-get?
2236
Why don't the Ubuntu repositories have the latest versions of software?
155325
What does "No bootable medium found" mean in VirtualBox?
133752
How can I update Visual Studio Code on Ubuntu?
127766
how to upgrade my Debian package with minor changes
131270
What means "unable to make backup link of /binary before installing new version: No such file or directory"?