Creating and removing Users in Linux

Create user

adduser <user_name>

Add user to sudo

usermod -a -G sudo <user_name>

List users

sudo less /etc/passwd

Remove user

sudo deluser <user_name>

Noshell Linux User

Create user:

sudo useradd --shell /usr/sbin/nologin <proxyuser>

Create password for user:

sudo passwd proxyuser

Change password

For current user:

passwd

For other user:

sudo passwd <user_name>

List users

cut -d: -f1 /etc/passwd