/var/log/message
what it's doing for ?Dec 6 04:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 04:01:01 localhost systemd: Starting Session 63 of user root.
Dec 6 04:01:01 localhost systemd: Started Session 63 of user root.
Dec 6 05:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 05:01:01 localhost systemd: Starting Session 64 of user root.
Dec 6 05:01:01 localhost systemd: Started Session 64 of user root.
Dec 6 06:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 06:01:01 localhost systemd: Starting Session 65 of user root.
Dec 6 06:01:01 localhost systemd: Started Session 65 of user root.
Dec 6 07:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 07:01:01 localhost systemd: Starting Session 66 of user root.
Dec 6 07:01:01 localhost systemd: Started Session 66 of user root.
Dec 6 08:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 08:01:02 localhost systemd: Starting Session 67 of user root.
Dec 6 08:01:02 localhost systemd: Started Session 67 of user root.
Dec 6 09:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 09:01:01 localhost systemd: Starting Session 68 of user root.
Dec 6 09:01:01 localhost systemd: Started Session 68 of user root.
Dec 6 10:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 10:01:01 localhost systemd: Starting Session 69 of user root.
Dec 6 10:01:01 localhost systemd: Started Session 69 of user root.
Dec 6 11:01:01 localhost systemd: Created slice user-0.slice.
Dec 6 11:01:01 localhost systemd: Starting Session 70 of user root.
Dec 6 11:01:01 localhost systemd: Started Session 70 of user root.
Dec 6 11:27:03 localhost systemd: Created slice user-1000.slice.
Dec 6 11:27:03 localhost systemd: Starting Session 71 of user vwu.
Dec 6 11:27:03 localhost systemd: Started Session 71 of user vwu.