Centos - Adduser

You can also do this from the command line, below are the equivalent commands. You need to have root level access to use the commands below.

• usr/sbin/useradd [options] login_name
  creates a new user
• usr/sbin/usermod [options] login_name
  modifies a user’s attributes
• usr/sbin/userdel [options] login_name
  deletes the specified user. Use the -r option to automatically remove the user’s home directory and mail spool.
• usr/bin/passwd login_name
  sets the password for the specified user
• usr/sbin/groupadd [options] group_name
  creates a new group
• usr/sbin/groupmod [options] group_name
  modifies a group’s attributes
• usr/sbin/groupdel group_name
  deletes the specified group