Users and groups

Cheat sheet

• id alice uid/gid/groups
• sudo useradd -m -s /bin/bash bob create
• sudo usermod -aG sudo bob add to a group (with -a, or it replaces all)
• sudo passwd bob set a password
• sudo passwd -l bob lock password login
• sudo chage -M 90 bob maximum password age — 90 days
• getent group sudo who's in the group