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If I forget the root password

Posted on 1999-07-05
Medium Priority
Last Modified: 2010-04-20
How I could know the root password if I forget it ( Using RedHat 5.2 ) or at least login to the system to change it????
Question by:HeroPlus
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1 Comment

Accepted Solution

bahdb0yy earned 400 total points
ID: 1635006
It is impossible to know the root password, since this root password iis, like all other passwords on your Linux box, stored in the /etc/password or /etc/shadow file, using the crypt(); function, which only has the possibility to crypt and store and to check if a password matches.

Decryption is not available because of obvious security reasons.

It is possible to change the root password of your box however by booting into single user mode (kernel option -s, ie. If your boot-configuration boots 'linux' as default, booting into single-user mide would be done by typeing 'linux -s' at your LILO prompt.

The system will put you in a root prompt on the console, where you can do anything including the 'passwd' command, do set your password.

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