Boot into grub, select single user but do not press enter.
Press e to bring you into edit mode.
Scroll down to the kernel line, it starts with “linux /boot/vmlinuz-2.6…….”
Scroll to the end of that line and press space key once and type
Press e to bring you into edit mode.
Scroll down to the kernel line, it starts with “linux /boot/vmlinuz-2.6…….”
Scroll to the end of that line and press space key once and type
init=/bin/bash
Press Crtl x to boot
Then type
mount -rw -o remount /
Now you can right to disk and change password or whatever else you want
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referece:
https://derwynd.com/2011/04/14/debian-squeeze-change-root-password/
