/etc/rc.conf_mount_rw to make filesystem temporarily writeable
/etc/rc.conf_mount_ro to set filesystem back to read-only
Restore backup and check filesystem of Pfsense Firewall
Select to boot into “single user” mode.
When you get a prompt, remount the filesystem into read/write mode using “mount -u /cf”
Check the filesystem for errors and repair them with “fsck -yf /“. or just fsck…
Locate and copy the restore file from the “/cf/conf/backup/” directory.
Copy it with ”cp /cf/conf/backup/config-12121221.xml /cf/config/config.xml”
Remove the file “/tmp/config.cache” using “rm /tmp/config.cache“.
Run the command “/etc/rc.reload_all start“.
Reboot using “reboot“.