Downgrade from 14.04 to 12.04
2136
How to roll back Ubuntu to a previous version?
50974
Can I legally downgrade from Win 7 64 bits to Win 7 32 bits?
7580
How to safely upgrade from an older Ubuntu version to a newer one?
7969
Can I downgrade SQL Server 2008 R2 Standard To Web Edition?
41825
How to downgrade from 64-bit to 32-bit
89856
How to resume the interrupted upgrade from 14.10 to 15.04?
123413
Will apt-get dist-upgrade upgrade my system to a newer version?
11556
Can I smoothly upgrade from one LTS to next LTS release?
71449
How can I revert a config file back to the originally installed version after I have edited it?
119169
Should I upgrade to 14.04 LTS?
34772
Downgrade nVidia Shield to Android 4.4 KitKat
111573
What's the best way to re-enable PPAs/repos after an upgrade?
38590
How do I suppress the "New release '12.10' available" message?
7095
How do I install different (upgrade or downgrade) PHP version in still supported Ubuntu release?
21524
I want to Change ubuntu 14.04 from 64 bit to 32 bit
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
66285
Package repository down, how to relocate?