# Revision history [back]

I have found the cause of the problem! The reason is that the machine identifier in /etc/machine-id changes at every reboot. This starts a new logging directory under /var/log/journal. Old logs can be viewed with the following command:

journalctl --merge


I'm still looking into the cause of the changing machine-id.

I have found the cause of the problem! The reason is that the machine identifier in /etc/machine-id changes at every reboot. This starts a new logging directory under /var/log/journal. Old logs can be viewed with the following command:

journalctl --merge


I'm still looking into UPDATE -- Here's the cause reason my machine-id kept changing on reboots:

My /etc/machine-id was volatile because it was mounted as a temporary filesystem (tmpfs), since Linode (correctly) zeroed out the contents of the changing machine-id.real /etc/machine-id. I fixed the problem by booting into rescue mode and writing a definitive identifier to /etc/machine-id. I have more thoroughly described this Linode-specific problem and fix here: http://unix.stackexchange.com/a/191373/18718