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Linux Centos ver 5.6 -- Lost Root Password

Does anyone know how to recover the root password?  The last Admin left the company and will not give us the root password.
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reboot into single user mode and use the passwd command
on boot, in grub screen, hit "e", and edit kernel command line, add "init=/bin/bash", then boot
after boot, you will automatically enter in root permissions.
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If your grub configuration is password protected the mentioned commands to change to grub boot menu might not work.
In that case you an always boot using another boot CD of a Linux-Live-Distribution or Linux-Recovery-CD and then edit /etc/passwd or /etc/shadow by hand.