В /var/log/auth.log вижу такое
Jun 21 06:47:01 debian-server CRON[13006]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 06:47:06 debian-server CRON[13006]: pam_unix(cron:session): session closed for user root
Jun 21 07:17:01 debian-server CRON[13050]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 07:17:01 debian-server CRON[13050]: pam_unix(cron:session): session closed for user root
Jun 21 08:17:01 debian-server CRON[13061]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 08:17:01 debian-server CRON[13061]: pam_unix(cron:session): session closed for user root
Jun 21 09:17:01 debian-server CRON[13073]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 09:17:01 debian-server CRON[13073]: pam_unix(cron:session): session closed for user root
Jun 21 10:17:01 debian-server CRON[13085]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 10:17:01 debian-server CRON[13085]: pam_unix(cron:session): session closed for user root
Jun 21 11:17:01 debian-server CRON[13096]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 11:17:01 debian-server CRON[13096]: pam_unix(cron:session): session closed for user root
Jun 21 12:17:01 debian-server CRON[13108]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 12:17:01 debian-server CRON[13108]: pam_unix(cron:session): session closed for user root
Jun 21 13:17:01 debian-server CRON[13121]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 13:17:01 debian-server CRON[13121]: pam_unix(cron:session): session closed for user root
Jun 21 14:17:01 debian-server CRON[13135]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 14:17:01 debian-server CRON[13135]: pam_unix(cron:session): session closed for user root
Jun 21 15:17:01 debian-server CRON[13151]: pam_unix(cron:session): session opened for user root by (uid=0)
Jun 21 15:17:01 debian-server CRON[13151]: pam_unix(cron:session): session closed for user root
много таких повторяющихся записей. Что они значат? Стоит ли волноваться?