Why did apt-get update fail?
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
94171
Why Does Software Updater Say No updates Available, but apt-get upgrade Shows updates available?
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
25001
E: Problem executing scripts APT Update::Post-Invoke-Success error during apt-get update
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
51598
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
39053
16.04 apt-get update hangs
73032
Installing apt-get
35152
Dependency errors for python3 and many others when I run sudo apt-get upgrade
133
How can I fix a 404 Error when using a PPA or updating my package lists?
1632
How do I fix a "Failed to download package files" error?
137317
libdvd-pkg: `apt-get check` failed, you may have broken packages. Aborting
126343
How to downgrade a package via apt-get?
154648
Getting error from apt-get when trying to install php5 package
5877
"Failed to fetch" while updating
16578
How to upgrade a single package using apt-get?
122742
Why does apt-get install a newer dependency than supported by the specified package