sudo apt-get update shows the following
15413
sudo apt update always giving Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
23275
What is the correct output of cat /etc/apt/sources.list?
83216
apt get update missing release file
135452
How do you see what packages are available for update
75824
Seeing apt-get changelogs for to-be-upgraded packages
24603
apt-get upgrade gives "403 forbidden" error
16753
Why should I regularly run 'apt-get update' and similar commands?
93246
How to resolve conflicting distributions in apt-get
45541
How to fix sudo after "chmod -R 777 /usr/bin"?
97588
sudo apt-get 'NOSPLIT Error'
31899
" sudo: source: command not found"
59119
apt-get, unmet dependencies, ... "but it is not going to be installed"
106931
How to undo sudo add-apt-repository?
13399
Why can I no longer (un)install packages via apt-get after doing a partial dist-upgrade?
18288
What is the difference between apt and apt-get?
106436
Long list of Hit and Get from sudo apt update
41948
warning message at command line `sudo`