Here wer are discussing.. how to create and manage users graphically.
Before going to this part you should know what is a user or a user group in Linux.
Users and groups are created to enhance the security of your files and applications in your server... I mean computer.
There are three types on users in linux.
1. root user
root users is the super user in any Linux machine who has almost all the permissions. We cannot create more that one user of this type as you can make more than one users as administrator in windows. User id of root user will be 0. [user id is the id that the system used to identify the user]
2. Normal user
All other users logs in the system is normally called a normal user. All such users in Linux will have a username and a password. User id of these users will start from 500.
3. System users
These users are internal system users who will not be logged in from outside. These users will not have a log in shell as well. They will have user id from 1 to 499.
Note: To see the list off all users, you can read a file /etc/passwd
Every user in Linux will be a member of a user group. If you have not specified the group for a user while creating using graphical utility, the user will be a member of a user group called users. We will see what is the purpose of this groups in chapter 14 where we discuss about permissions.
Now, to create a user or to modify any property of them in graphical environment:
Go system->administration -> users and groups
This utility called system-config-users will help u to create and manage users and groups. To manage any existing users or groups, select it and go for properties.
in password info v hav
----------------------
days b4 change allowed--> maximum life of the password
days b4 change required-->minimum days required to change ur passwd
days warning b4 change--> number of days to warn b4 it expires
days b4 account inactive--> after expiration to be inactive
This is a quite simple interface, anyone can learn it without any assistance