How do I start completely over with the latest version of Ubuntu?
413
How do I install Ubuntu?
30645
How to install (old) packages for Ubuntu 9.04?
134817
How do I set Ubuntu to my default boot?
111573
What's the best way to re-enable PPAs/repos after an upgrade?
48945
How to reinstall newest Linux Kernel?
18266
How do I completely remove Ubuntu?
25739
How do I reinstall Unity?
58888
Change Ubuntu 17.04 to Ubuntu 16.04.2 LTS
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
99169
How to install previous Firefox version?
2018
How to remove everything Ubuntu One-related?
122007
Dual boot. How do I reinstall the Ubuntu partition?
94125
Accidently deleted /usr/lib, how do I restore it?
128471
How do I update from 9.0.10 to 9.1.0?
69200
How do I reinstall Ubuntu Software in Ubuntu 20.04 LTS version?
78859
How to reinstall default packages
62881
After upgrading from Ubuntu 14.04 LTS to 16.04 LTS, last process left cleaning, how to perform?