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systemctl list-timers

Пример вывода

NEXT                         LEFT          LAST                         PASSED       UNIT                         ACTIVATES
Fri 2022-03-25 08:39:00 MSK  6min left     Fri 2022-03-25 08:09:01 MSK  23min ago    phpsessionclean.timer        phpsessionclean.service
Fri 2022-03-25 14:29:19 MSK  5h 56min left Fri 2022-03-25 05:36:01 MSK  2h 56min ago certbot.timer                certbot.service
Fri 2022-03-25 15:36:23 MSK  7h left       Thu 2022-03-24 15:36:23 MSK  16h ago      systemd-tmpfiles-clean.timer systemd-tmpfiles-clean.service
Sat 2022-03-26 00:00:00 MSK  15h left      Fri 2022-03-25 00:00:01 MSK  8h ago       logrotate.timer              logrotate.service
Sat 2022-03-26 00:00:00 MSK  15h left      Fri 2022-03-25 00:00:01 MSK  8h ago       man-db.timer                 man-db.service
Sat 2022-03-26 04:30:43 MSK  19h left      Fri 2022-03-25 06:54:01 MSK  1h 38min ago apt-daily.timer              apt-daily.service
Sat 2022-03-26 06:16:55 MSK  21h left      Fri 2022-03-25 06:24:01 MSK  2h 8min ago  apt-daily-upgrade.timer      apt-daily-upgrade.service