When I execute
journalctl -f -a under Fedora 20 for different users I get different results. For root I get something similar to
tail -f /var/log/syslog on older systems. As normal user I get gnome-shell warnings, some su messages, stuff Firefox writes to stdout etc. - basically a user session log.
I understand that journalctl has the concept of different journals (journalctl(1)):
Output is interleaved from all accessible journal files, whether they are rotated or currently being written, and regardless of whether they belong to the system itself or are accessible user journals.
But how to get list which journals are available for a given user?
And how to give a normal user also access to the root journal?
The journalctl man page states:
All users are granted access to their private per-user journals. However, by default, only root and users who are members of the "systemd-journal" group get access to the system journal and the journals of other users.
But this sounds like too much - the user should not have access to the journals of other normal users (just to the root journal).