/etc/systemd/journald.conf

/etc/systemd/journald.conf journalctl configuration file.

cat /etc/systemd/journald.conf  | grep -v "#" | grep .
[Journal]

Example default file in Ubuntu 18.04 LTS

/etc/systemd/journald.conf
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.
#
# Entries in this file show the compile time defaults.
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# See journald.conf(5) for details.

[Journal]
#Storage=auto
#Compress=yes
#Seal=yes
#SplitMode=uid
#SyncIntervalSec=5m
#RateLimitIntervalSec=30s
#RateLimitBurst=1000
#SystemMaxUse=
#SystemKeepFree=
#SystemMaxFileSize=
#SystemMaxFiles=100
#RuntimeMaxUse=
#RuntimeKeepFree=
#RuntimeMaxFileSize=
#RuntimeMaxFiles=100
#MaxRetentionSec=
#MaxFileSec=1month
#ForwardToSyslog=yes
#ForwardToKMsg=no
#ForwardToConsole=no
#ForwardToWall=yes
#TTYPath=/dev/console
#MaxLevelStore=debug
#MaxLevelSyslog=debug
 
#MaxLevelKMsg=notice
#MaxLevelConsole=info
#MaxLevelWall=emerg
#LineMax=48K

Activities

• Modify SystemMaxUse to limit size of journal, for example: SystemMaxUse=100M. Restart: systemctl restart systemd-journald and verify using: journalctl --disk-usage

See also

• journald: journalctl journald.conf, journalctl --help, /dev/console
• Syslog, rsyslogd, /etc/rsyslog.conf, PAN-OS syslog