How to check last boot’s systemd journal log in CentOS 7 Linux?
The command to check last boot’s journal log shows nothing on Rocky Linux 9:
# journalctl -b -1
Failed to look up boot -1: No such boot ID in journal
Is the log stored and where it is?
The reason this happens on Rocky Linux 9 is that Rocky Linux 9 by default does not enable the persistent storage of log messages. You can enable it and configure journald to store the log files into `/var/log/journal` by
# mkdir /var/log/journal
# systemd-tmpfiles --create --prefix /var/log/journal
# systemctl restart systemd-journaldEditor’s note: This article has been updated to reflect current software versions as of 2026. Commands and package names have been revised accordingly.