Linux users and groups.md

Users in Linux

Sorted list of all users:

cat /etc/passwd | awk -v FS=: -e '{print $1}' | sort

Switch to another user (prompts for password):

su - my_other_user

Groups

List of all groups:

cat /etc/groups

Groups a user is in:

groups my_user

Add a user to a group:

sudo adduser my_user my_group

Change group of a file:

chgrp my_group my_file

Add write permission for all users in a group to a file:

chmod g+w my_file