1. First you should physically near the server for direct access :) and reboot the server. Then interrupt the boot by pressing any key. You will get a screen like follows.
2. Press 'e' to edit and add "rd.break" to the end of the linux16 line. Then press "Ctril X" to start.
You will get a screen like follows...
3. Mount "/sysroot" with read/write permissions.
#mount -o remount,rw /sysroot
4. Switch into chroot jail. Set /sysroot as the root
#chroot /sysroot
5. Set password for root.
#passwd root
6. Enable selinux
5. Set password for root.
#passwd root
6. Enable selinux
#touch /.autorelabel
7.end :)
#exit
#exit
