Ubuntu gives the message "You are in emergency mode."

When I booted I received the following message: > You are in emergency mode. After logging in type "journalctl -xb" to view system logs, "systemctl reboot" to reboot, "systemctl default" or "exit" to boot into default mode. Press Enter for maintenance After pressing Enter I checked journalctl -xb, and I received the following message:

root@rissASUS:~# journalct1 -xb | grep failed
Jul 20 19:16:47 rissASUS systemd: /usr/lib/systemd/system-generators/systemd-fstab-generator failed with exit status 1.
Jul 20 19:16:51 rissASUS systemd-fsck: fsck failed with exit status 4.
-- Subject: Unit failed
-- The unit systemd-fsck@dev-disk-by\x2duuid-5cb90862\x2d8d25\x2d4ba9\x2db71b\x2dfa56a76c7ee8.service has entered the 'failed' state with result
-- Subject: A start job for unit systemd-fsck@dev-disk-by\x2duuid-5cb90862\x2d8d25\x2d4ba9\x2db71b\x2dfa56a76c7ee8.service has failed
-- The job identifier is 51 and the job result is failed.
Jul 20 19:16:51 rissASUS systemd: Dependency failed for /home.
-- Subject: A start job for unit home.mount has failed
Jul 20 19:16:51 rissASUS systemd: Dependency failed for Local File Systems.
-- Subject: A start job for unit local-fs.target has failed
Jul 20 19:16:51 rissASUS systemd: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
Jul 20 19:16:51 rissASUS systemd: home.mount: Job home.mount/start failed with result 'dependency'.
root@rissASUS:~#

How to solve this problem?