Is there a way to undo an accidental Magic SysRq "remount-ro"? On my notebook keyboard, this combination happens all too often...
I tried to remount the roor partition with
mount -o remount,rw /dev/mapper/kubuntu--vg-root /, but it fails with
mount: /: mount point not mounted or bad option.`
mount however says:
/dev/mapper/kubuntu--vg-root on / type ext4 (ro,relatime,errors=remount-ro,data=ordered