Upgrade to Ubuntu 14.04.5 LTS Failed
5494
Permission denied, are you root?
132495
14.04.5 to 16.04 Update failed - xenial.tar.gz.gpg missing
70403
Impossible to install EPEL 5.4 on Ubuntu 14.04
12614
Upgrade problem
135692
ubuntu 14.04 black screen when installing
59088
How to upgrade to a newer release of Ubuntu using the Live CD?
103929
sudo apt upgrade error 18.04 (Broken Packages)
404
Last upgrade crashes network manager (no internet connection, no applet)
65099
Unable to install any updates through update manager/apt-get upgrade
58979
How can I upgrade Ubuntu LTS to the next one offline?
135383
Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
22624
Unable to locate package kubuntu-plasma5-desktop on 14.04
51767
Ubuntu 17.10 Upgrade Broke VMWare Workstation 12.5
120436
Point Release upgrade from 14.04.1 to 14.04.2?
11556
Can I smoothly upgrade from one LTS to next LTS release?
17645
Unable to upgrade pip
151605
upgrading from 15.10 to 16.04 apt not installed