Unable to run sudo apt update or sudo apt-get update due to hash sum mismatch
4853
Trouble downloading packages list due to a "Hash sum mismatch" error
60784
relocation error using sudo apt
150033
E: Sub-process /usr/bin/dpkg returned an error code (1) for almost all updates
108510
apt-get update very slow, stuck at "Waiting for headers"
152823
PPAs will not install "sudo: add-apt-repository: command not found"
62855
sudo add-apt-repository throws an exception
64509
Can't update from official repositories [Error 409]
44683
Problem with sudo apt update in Ubuntu 18.04: Post-Invoke-Success if /usr/bin/test -w /var/lib/command-not-found/
105451
apt update: Could not handshake: An unexpected TLS packet was received
6809
How do I fix the GPG error "NO_PUBKEY"?
103929
sudo apt upgrade error 18.04 (Broken Packages)
94793
How do you run update-grub?
44313
How to run "sudo apt-get update" through proxy in commandline?
106436
Long list of Hit and Get from sudo apt update
34016
Why is apt-get unable to locate bitcoin and bitcoin-qt package?
6105
What is the easiest way to resolve apt-get BADSIG GPG errors?
144036
sudo apt-get curl and sudo apt-get wget gives "Invalid operation"