Reset Root Password
If a root password is forgotten, you can reset it:
- Reboot the server
- From the grub boot menu, select the kernel
- Press the e key to edit the entry
- Select second line (the line starting with the word kernel)
- Press the e key to edit kernel entry so that you can append single user mode
- Append the letter S (or word Single) to the end of the (kernel) line
- Press ENTER key
- Now press the b key to boot the Linux kernel into single user mode
- You may need to mount at least / and other partitions:
mount -t proc proc /proc mount -o remount,rw /
- Change the root password, enter:
passwd
Finally reboot system:
sync reboot