Cannot install sendmail or update Ubuntu
1520
How to install software or upgrade from an old unsupported release?
120161
Ubuntu 19.04 problems install upgrades
131270
What means "unable to make backup link of /binary before installing new version: No such file or directory"?
29326
Can't install a package due to "Something wicked happened resolving" error
30645
How to install (old) packages for Ubuntu 9.04?
93942
How to fix "Failed to download repository information" error while updating?
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
78671
Cannot install virtualbox extension pack
2280
Package system is broken. How to fix it?
32426
How to install packages?
13054
Failing package manager?
118978
Not all updates can be installed: partial upgrade
56150
Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
156977
Unable to install files with apt-get: "unable to locate package"
76241
"no public key available" while upgrading using update-manager
97771
"The package lists or status file could not be parsed or opened"
85943
Can't update or install apps on Ubuntu Touch