Can't upgrade packages
2694
How do I remove a malformed line from my sources.list?
63176
How can I update to Ubuntu 21.04?
76905
Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application
13399
Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?
32426
How to install packages?
134080
Still can't upgrade? Is there a new delay?
43579
I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?
84537
Using dpkg to install upgrade and dist-upgrade packages
2280
Package system is broken. How to fix it?
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
13107
How to install updates via command line?
3523
What does "Package  has no installation candidate" mean?
32200
How do I downgrade a package?
30588
Unable to locate package
48809
"The upgrade has aborted" error, how to proceed?