Файл настроек: /etc/systemd/journald.conf
Список последних загрузок:
>journalctl —list-boots
-10 a843385338a345ba8624afdb540958ac Wed 2020-10-14 22:26:33 MSK—Wed 2020-10-21 00:45:37 MSK
-9 d00f8ed0dade4d79a3ae532a31d9e48d Wed 2020-10-21 00:46:06 MSK—Thu 2020-10-22 16:21:57 MSK
-8 9cb91d48cf044b7692185886a56cf626 Thu 2020-10-22 16:23:51 MSK—Thu 2020-10-22 21:18:06 MSK
-7 73639158c7f24ad4b9d0441ba0056544 Thu 2020-10-22 21:18:40 MSK—Thu 2020-10-22 21:25:59 MSK
-6 22bec3b93a134219be1130b1a8b61bb3 Thu 2020-10-22 21:26:22 MSK—Sun 2020-10-25 14:12:29 MSK
-5 5cd092de09da43ada66385fe8f7fccae Sun 2020-10-25 14:56:54 MSK—Sun 2020-10-25 17:55:28 MSK
-4 02b7067e714a429bb259b634b5118d15 Sun 2020-10-25 18:02:56 MSK—Sun 2020-10-25 18:06:14 MSK
-3 f7dc97bab377439f9b997347b2deba2d Sun 2020-10-25 18:06:42 MSK—Sun 2020-10-25 18:08:11 MSK
-2 1269d557225f4a16ad7e1621142c5a49 Sun 2020-10-25 18:12:11 MSK—Sun 2020-10-25 18:37:23 MSK
-1 ea48cfbac029432cbea0f94b81744949 Sun 2020-10-25 18:37:44 MSK—Sun 2020-10-25 18:54:51 MSK
0 115cbebd2b8542bcb9e126760c9fd3a2 Sun 2020-10-25 18:55:13 MSK—Mon 2020-10-26 23:59:02 MSK
Посмотреть журнал загрузки номер -1:
> journalctl -b -1
-- Logs begin at Thu 2020-06-18 10:44:21 MSK, end at Tue 2020-10-27 00:45:29 MSK. --
окт 25 18:37:44 notebook kernel: microcode: microcode updated early to revision 0x2f, date = 2019-02-17
окт 25 18:37:44 notebook kernel: Linux version 5.4.0-52-generic (buildd@lgw01-amd64-060) (gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04>
окт 25 18:37:44 notebook kernel: Command line: BOOT_IMAGE=/vmlinuz-5.4.0-52-generic root=UUID=d9e99dd5-b26b-4bbc-8f9a-733fe5276e05 ro qui>
окт 25 18:37:44 notebook kernel: KERNEL supported cpus:
окт 25 18:37:44 notebook kernel: Intel GenuineIntel
...
А если добавить в cron, то можно:
journalctl --vacuum-time=2d # хранить данные только за 2 дня
journalctl --vacuum-size=300M # хранить только 300MB
Delete journalctl logs:
journalctl --disk-usage # (To see the size of the log)
sudo journalctl --vacuum-time=1d # (To delete, the 1d represents that it will delete logs more than a day older)