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--- home_server:home_server_setup:other_services:systemd [2021-03-01 Mon wk09 10:26] – [systemd timers] baumkp
+++ home_server:home_server_setup:other_services:systemd [2023-04-30 Sun wk17 17:43] – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+{{tag>systemd systemctl timer timers journalctl linux debian ubuntu setup customise customisation}}
 ======systemd Stuff======
   * [[https://linuxconfig.org/how-to-create-systemd-service-unit-in-linux|How to create systemd service unit in Linux]]
@@ Line 15: / Line 16: @@
 =====Journalctl stuff=====
+''man journald.conf'' manual page for journald.conf\\
+''man journalctl'' manual page for journalctl\\
+Edit ''sudo vim /etc/systemd/journald.conf'' make variable ''Storage=persistent'' to make journald store the journal files in ''/var/log/journal'', this will create directory if necessary. This also ensure log files are available from previous boots.\\
+\\
+''sudo systemctl force-reload systemd-journald'' to reload journald or restart instead
+''sudo journalctl -u systemd-journald'' to check status of journal.\\
+\\
+some useful flag and inputs:
+  *''sudo journalctl -b'' to see current boot journal only use ''-b -1'' to see last boot entries.
+  *''journalctl --list-boots'' to list all available journaled boots.
+  *''sudo journalctl -u pppoe'', use u flag to see specified unit files only.
+  *''sudo journalctl -k'' to see kernel messages only
+  *''sudo journalctl -p 3'' to see only specified error priority messages and more severe.
+    * 0: emerg
+    * 1: alert
+    * 2: crit
+    * 3: err
+    * 4: warning
+    * 5: notice
+    * 6: info
+    * 7: debug
+  * ''-r'' flag is used to show in reverse chronological order.
+some links:\\
+[[https://www.linode.com/docs/guides/how-to-use-journalctl/|Use journalctl to View Your System's Logs]]
 =====systemd timers====
 ''timedatectl'' to print current time date on cli\\
-''Date'' to print basic time date only on cli
+''Date'' to print basic time date only on cli\\
+''timedatectl list-timezones'' to set available time zones\\
+''sudo timedatectl set-timezone australia/perth'' to set timezone\\
 Some links:
   *Arch Linux [[https://wiki.archlinux.org/index.php/Systemd/Timers|systemd/Timers]]