NAME
useradd – create a new user or update default new user information
SYNOPSIS
useradd [options] LOGIN
useradd -D
useradd -D [options]
EXAMPLE
add user jerry to groups admins, ftp, www, and developers, enter:
useradd -G admins,ftp,www,developers jerry
add a user tony to group developers use following command:
useradd -g developers tony