The following type of error gets thrown when updating Ubuntu
Failed to fetch http://ubuntu.byteiran.com/ubuntu/dists/jammy/InRelease
sudo apt update always giving Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Solution was to comment out file with byteiran in it.
sudo subl /etc/apt/sources.list.d/nala-sources.list
Other Standard Sources
sudo subl sudo /opt/sublime_text/sublime_text /etc/apt/sources.list
# deb http://ubuntu.byteiran.com/ubuntu/ jammy main restricted universe multiverse
