update manger on Ubuntu 12.04
12054
How do I deal with "unauthenticated sources" errors in the Software Center?
30645
How to install (old) packages for Ubuntu 9.04?
4305
How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
2236
Why don't the Ubuntu repositories have the latest versions of software?
63278
Update Linux Subsystem on Windows (Ubuntu) to 16.04
67359
Upgrade to the latest PHP version in Ubuntu
94621
archive.ubuntu.com missing raring-updates
59559
How to upgrade Git on Ubuntu Hardy?
13107
How to install updates via command line?
25224
Updating to latest Blender version
120229
Understanding various update and upgrade commands
52190
How and when is old-releases.ubuntu.com updated?
16707
How do I install VMware Player 4.0.3 (and patch the installer to work on my 12.04 system)?
144172
How to upgrade to a point release from the same base release (12.04 to 12.04.03)
88589
Can I install Portage, Pacman or other package managers on Ubuntu?
83715
Is there any way to Install Latest Nautilus File Manager in Ubuntu 12.04 LTS
127511
How to update Blender 2.8?