Linux Users & Groups

Users

Check the list of users on the system:

cat /etc/passwd

Create a new user with home directory:

sudo useradd -m USERNAME

Set a password for a user:

sudo passwd USERNAME

Groups

Add a user to a group:

sudo usermod -aG GROUP_NAME USERNAME

Check all groups a user belongs to:

groups USERNAME

Check all users in a group:

grep GROUP_NAME /etc/group

Remove a user from a group:

sudo gpasswd -d USERNAME GROUP_NAME