Ho trovato nel syslog questo:

Oct 21 12:35:17 servermio /usr/sbin/cron[5407]: (CRON) INFO (Running @reboot jobs)
Oct 21 13:35:26 servermio /usr/sbin/cron[5380]: (CRON) INFO (Running @reboot jobs)
Oct 21 14:36:15 servermio /usr/sbin/cron[5381]: (CRON) INFO (Running @reboot jobs)
Oct 21 15:36:20 servermio /usr/sbin/cron[5374]: (CRON) INFO (Running @reboot jobs)
Oct 21 16:37:17 servermio /usr/sbin/cron[5398]: (CRON) INFO (Running @reboot jobs)
Oct 21 17:37:39 servermio /usr/sbin/cron[5432]: (CRON) INFO (Running @reboot jobs)
Oct 21 18:37:36 servermio /usr/sbin/cron[5379]: (CRON) INFO (Running @reboot jobs)
Oct 21 19:38:16 servermio /usr/sbin/cron[5443]: (CRON) INFO (Running @reboot jobs)
Oct 21 21:39:05 servermio /usr/sbin/cron[5393]: (CRON) INFO (Running @reboot jobs)
Oct 21 22:39:46 servermio /usr/sbin/cron[5104]: (CRON) INFO (Running @reboot jobs)
Oct 21 23:39:53 servermio /usr/sbin/cron[5113]: (CRON) INFO (Running @reboot jobs)
Oct 22 00:40:15 servermio /usr/sbin/cron[5093]: (CRON) INFO (Running @reboot jobs)
Oct 22 01:40:40 servermio /usr/sbin/cron[5092]: (CRON) INFO (Running @reboot jobs)
Oct 22 02:41:04 servermio /usr/sbin/cron[5048]: (CRON) INFO (Running @reboot jobs)
Oct 22 03:41:37 servermio /usr/sbin/cron[5051]: (CRON) INFO (Running @reboot jobs)
Oct 22 04:41:57 servermio /usr/sbin/cron[5054]: (CRON) INFO (Running @reboot jobs)
Oct 22 05:42:24 servermio /usr/sbin/cron[5052]: (CRON) INFO (Running @reboot jobs)
Oct 22 06:42:56 servermio /usr/sbin/cron[5059]: (CRON) INFO (Running @reboot jobs)
Oct 22 07:43:18 servermio /usr/sbin/cron[5043]: (CRON) INFO (Running @reboot jobs)
Oct 22 08:58:38 servermio /usr/sbin/cron[5097]: (CRON) INFO (Running @reboot jobs)

Come mai?

possibile che si riavvii così precisamente ogni ora?