I have messed up my
sudoers file and I want to change the permission on it.
When I login in recovery mode, I cannot run the command
chmod as it is read-only option.
mount -o remount,rw / in recovery mode. Didn't work for me:
Err : Ext4-fs remount. Opts errors=remount-ro
How can I boot into recovery mode and with read-write option?