Filesystem check or mount failed. A maintenance shell will now be started. CONTROL-D will terminated this shell and continue booting after re-trying filesystems. Any further errors will be ignored /proc/self/fd/8: 20: /sbin/sulogin: Input/output error init: mountall-shell main process (287) terminated with status 2 start: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the rep ly timeout expired, or the network connection was broken.