Can I give all the power of root to any user in Linux.If yes then how??????

two ways (at least):

1. You can allow the user to "su" to root (by default enabled for all users).

2. If you want to give them access to only certain commands, install a program called sudo: http://www.courtesan.com/sudo/

1. give your root password to your users.

2. use setuid root programs to do something with privilege (like passwd)

3. use sudo

4. pam enabled su can be configured not to ask for password to certain users