Every time I try to upgrade from Ubuntu 13.04 to 13.10, it fails
126311
How to resize boot partition
107009
ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
42634
How do I upgrade to the development release (aka. Ubuntu+1)?
36354
Why am I not able to shutdown, log-off and restart after an upgrade to Ubuntu 13.10?
12534
14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
5820
How to fix the “Unable to calculate upgrade” issue from command line when upgrading from 12.04 to 14.04?
23096
How to remove obsolete packages after failed release upgrade via do-release-upgrade on Ubuntu?
1520
How to install software or upgrade from an old unsupported release?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
16837
Unable to upgrade from 14.04 to 14.10 "Cannot Calculate Upgrades"
153774
Upgrade to Ubuntu 13.10 from ISO image
53609
Download of Ubuntu fails
15687
How do I resume a release upgrade?
129101
Upgrading Ubuntu 9.04 to 9.10 when Update Manager doesn't let you
140893
Error when using apt-get update
119920
Failed upgrade from Ubuntu 19.10 to 20.04 "Please update the microcode"
105335
How do I upgrade my Ubuntu server from one LTS version to another? Is this safe?