Ubuntu commands cheat sheet

commands.md

• list all local users
  cut -d: -f1 /etc/passwd

• list users and their permissions
  cat /etc/passwd

• list groups
  cat /etc/groups

• add new user
  sudo adduser new_username
sudo useradd new_username

• delete a user
  sudo userdel username
  To delete the home directory for the deleted user account:
  sudo rm -r /home/username

• modify username
  usermod -l new_username old_username

• change user password
  sudo passwd username

• change user shell
  sudo chsh username

• change user details
  sudo chfn username

• add user to sudo group
  adduser username sudo
usermod -aG sudo username

• list user groups and gid
  id username

• WireGuard start/stop cmds
  sudo wg-quick up reopen-garden sudo wg-quick down reopen-garden

• WireGuard start on boot
  sudo systemctl enable wg-quick@reopen-garden.service

• remove package
  sudo apt-get purge --auto-remove packagename

• list all packages
  apt list --installed

• list occupied ports sudo lsof -i -P -n | grep LISTEN