We all know that journalctl can be a good thing if you want it to be...

persistent-journalctl.txt

Enabling a persistent journal can be done by using the following steps:

1. Create the directory /var/log/journal.

        [root@demo ~]# mkdir /var/log/journal          
        
2. Set the group ownership of the new directory to systemd-journal, and the permissions to 2755.

	[root@demo ~]# chown root:systemd-journal /var/log/journal
	[root@demo ~]# chmod 2755 /var/log/journal

3. Inform systemd-journald that the new location should be used by sending a USR1 signal to it. A reboot will also suffice.

        [root@demo ~]# killall -USR1 systemd-journald