"Once filesystems are mounted read-only you can safely power off the machine."
In Ubuntu/Kubuntu there was once a key combination to forcefully unmount all file systems. THey seemed to have discontinued this? No?
In Ubuntu/Kubuntu there was once a key combination to forcefully unmount all file systems. THey seemed to have discontinued this? No?
- Alt+SysRq+u remounts all filesystems readonly.
Looks like some of the Magic SysRq Keys are disabled by default now in new Ubuntus.