Change the forgotten root password.
Reset forgot root password in CentOS 6.1/6.2/6.3/6.4/6.5 To reset forgot root password in CentOS 6.0/6.1/6.2/6.3/6.4/6.5 and Fedora 16/17/18/19/20 follow the given below steps: Step1: Boot your CentOS linux system and press esc key when you see the message “ Press any key to enter the menu ” Message on system booting Step 2: Now, select your operating system if it is dual/multiple boot and pres ‘ a ‘ to modify kernel argument . If you cancel press ‘ ESC ‘ key. Boot menu [ [ ads ] Step 3 : In kernel configuration, we have 2 methods to change to single mode . 1 we can use a number “ 1 ″, 2 we can use character “ S ”. Enter after done. Opened 1 at the GRUB Step 4 : After reboot type ‘ passwd ‘ command without username and press ‘ Enter ‘ key in command prompt. Change root password Step 5 : Reboot your system and login using the new password . Reference: http://wiki.centos.org/TipsAndTricks/ResetRootPass...