Linux User Management Cheat Sheet

Add User

Create new user account.

sudo useradd username
sudo useradd -m username
sudo useradd -s /bin/bash username
sudo useradd -m -s /bin/bash -G sudo username

Delete User

Remove user account.

sudo userdel username
sudo userdel -r username

Modify User

Change user properties.

sudo usermod -aG groupname username
sudo usermod -s /bin/zsh username
sudo usermod -L username
sudo usermod -U username

Change Password

Set or change password.

passwd
sudo passwd username
passwd -l username
passwd -u username

Switch User

Switch to another user.

su username
su -
su - username

Sudo

Execute as root.

sudo command
sudo -i
sudo -u username command
sudo visudo

Group Management

Manage groups.

sudo groupadd groupname
sudo groupdel groupname
sudo gpasswd -a username groupname
sudo gpasswd -d username groupname

View Users

List users and info.

cat /etc/passwd
whoami
who
w
id username