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| home_server:home_server_setup:other_services:systemd [2021-03-01 Mon wk09 22:16] – [Journalctl stuff] baumkp | home_server:home_server_setup:other_services:systemd [2023-12-26 Tue wk52 11:39] (current) – baumkp |
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| | {{tag>systemd systemctl timer timers journalctl linux debian setup customise customisation}} |
| ======systemd Stuff====== | ======systemd Stuff====== |
| * [[https://linuxconfig.org/how-to-create-systemd-service-unit-in-linux|How to create systemd service unit in Linux]] | * [[https://linuxconfig.org/how-to-create-systemd-service-unit-in-linux|How to create systemd service unit in Linux]] |
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| 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.\\ | 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 systemctl force-reload systemd-journald'' to reload journald or restart instead |
| ''sudo journalctl -u systemd-journald'' to check status of journal\\ | ''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:\\ | some links:\\ |
| [[https://www.linode.com/docs/guides/how-to-use-journalctl/|Use journalctl to View Your System's Logs]] | [[https://www.linode.com/docs/guides/how-to-use-journalctl/|Use journalctl to View Your System's Logs]] |