sudo apt upgrade not working after ubuntu update
991
How can I fix apt error "W: Target Packages ... is configured multiple times"?
39732
How to fix apt-get install / update not working on my Kali Linux
12368
A "failed to fetch" error occurs when apt-get update is run. How do I fix this?
44683
Problem with sudo apt update in Ubuntu 18.04: Post-Invoke-Success if /usr/bin/test -w /var/lib/command-not-found/
111138
Sudo command no longer functions properly
1983
Can sudo be reinstalled after being removed?
136771
Why is sudoers NOPASSWD option not working?
80899
"no public key available" on apt-get update
127668
"Unable to locate package sudo" when i try to install sudo on new Debian
140231
How to get back sudo on Ubuntu?
15413
sudo apt update always giving Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
8252
Accidentally deleted 'sudo'
79330
what does "sudo apt-get install aptitude" do?
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
127196
"Error processing package" - apt upgrade cannot run due to package configuration errors
69960
What is sudo apt-get -f install?
89652
Lost access to sudo