Unable to update, unable to install and "Software and Updates" doesn't open either
97588
sudo apt-get 'NOSPLIT Error'
85943
Can't update or install apps on Ubuntu Touch
119943
Where can I find a repository for older unsupported releases?
36104
"Software can't be installed or removed because the authentication service is not available. "
5877
"Failed to fetch" while updating
80899
"no public key available" on apt-get update
93942
How to fix "Failed to download repository information" error while updating?
73068
cant install or remove anything on 18.04 cause of DPKG error
42073
What to do when a Windows Update (KB4480970) breaks your computer?
26365
“qnmqkmkrqwfq” is damaged and can’t be opened , even though i set Allow applications downloaded from: Anywhere
72695
Can't connect to Windows Update
144507
No facility exists in Update Manager to upgrade to a new version, why?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
7460
E: Unable to correct problems, you have held broken packages
63772
I can't boot into a usable system after updates. What should I do?
76241
"no public key available" while upgrading using update-manager
1520
How to install software or upgrade from an old unsupported release?