Users On Ubuntu

List all users

cut -d: -f1 /etc/passwd

Add User

sudo adduser [username]

Give user sudo privileges

sudo usermod -aG sudo [username]

To make it so you don't have to re-verify your password when using "sudo"

sudo visudo

Append to end of file

[username] ALL = NOPASSWD: ALL

Change Username

sudo usermod -l [newusername] [oldusername]

Set Password

sudo passwd [username]

Delete User

sudo deluser [username]

Delete user and remove user's home directory

sudo deluser --remove-home [username]