Process Useradd RedHat

useradd [options] username
inactive until
passwd username

process action after command "useradd arif"
1. vi  /etc/passwd

arif:x:501:501::/home/arif:/bin/bash

arif = username
x = indicate tht the system uses Shadow Password
501 = UID
501 = GID
:: = can be fullname or phone number
/home/arif = home directory
/bin/bash = default shell   

2. vi /etc/shadow
arif:!!:14798:0:99999:7::: 
 
3. vi /etc/group
arif:x:501: 

4. vi /etc/gshadow
arif:!:: 
! = lock the group

5. create home directory on /home
ls -l /home
  drwx------. 4 arif arif 4096 Mar 3 18:23 arif

6. copy default user setting on folder /etc/skel to /home/arif
ls -la /home/arif
drwx------. 4 arif arif 4096 Mar 3 18:23 .
drwxr-xr-x. 5 root root 4096 Mar 3 18:23 ..
-rw-r--r--. 1 arif arif 18 Jun 22 2010 .bash_logout
-rw-r--r--. 1 arif arif 176 Jun 22 2010 .bash_profile
-rw-r--r--. 1 arif arif 124 Jun 22 2010 .bashrc