$sudo apt-get update throws (101: Network is unreachable)
32237
Why I do get error 101? How is my DNS involved?
152027
how to install packages with apt-get on a system connected via proxy?
157904
error 503: service unavailable when using apt-get update behind proxy
127668
"Unable to locate package sudo" when i try to install sudo on new Debian
39053
16.04 apt-get update hangs
22164
Problem with sudo apt get update: The repository cdrom... does not have a Release file
71830
How to fix "sudo: unable to open ... Read-only file system"?
94986
Connection Refused while apt-get update ubuntu 18.04 over proxy
121873
sudo apt-offline install not updating
60351
How can I update to a newer version of Git using apt-get?
44313
How to run "sudo apt-get update" through proxy in commandline?
113379
Updating the repository isn't working
47119
Sudo comes up with an error, cannot run anything as root
130118
Ubunutu 18.04 Updates 404 error
18926
Type 'sudo' is not known in source list
33328
apt-get stuck at 0 [Connecting to us.archive.ubuntu.com]
31899
" sudo: source: command not found"