apt update/apt upgrade won't work after using GNOME Software
728
Unable to lock the administration directory (/var/lib/dpkg/) is another process using it?
44209
Problem with update-manager: No module named 'apt_pkg' in Ubuntu 13.10, having installed Python 3.4 on /usr/local/lib
151605
upgrading from 15.10 to 16.04 apt not installed
135597
Software from Ubuntu Software broken after install
20078
Gnome Software Center Not Loading
9086
How to get apt back after uninstalling it
103929
sudo apt upgrade error 18.04 (Broken Packages)
21382
What does "sudo apt-get update" do?
111573
What's the best way to re-enable PPAs/repos after an upgrade?
73196
What can I use instead of gnome-open?
154520
How to reinstall apt on Debian?
35146
Will apt-get dist-upgrade upgrade my system to newer version?
11579
Broken dependencies after upgrade
109064
How to solve the error "Failed to launch Terminal" after upgrading python?
91571
How do I install, update and remove GNOME Shell Extensions?
91491
How can I get "delta" packages to optimize apt-get upgrade downloads?
40641
What should be used instead of the deprecated gnome-open in Ubuntu 18.04?