Oct  4 17:50:03 ssjiang CRON[565780]: pam_unix(cron:session): session closed for user root
Oct  4 17:50:59 ssjiang CRON[565781]: pam_unix(cron:session): session closed for user root
Oct  4 17:51:01 ssjiang CRON[605442]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:51:02 ssjiang CRON[605442]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:52:01 ssjiang CRON[605451]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:52:01 ssjiang CRON[605451]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:53:01 ssjiang CRON[605461]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:53:02 ssjiang CRON[605461]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:54:01 ssjiang CRON[605470]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:54:02 ssjiang CRON[605470]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:55:01 ssjiang CRON[605481]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 17:55:01 ssjiang CRON[605480]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:55:01 ssjiang CRON[605479]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 17:55:01 ssjiang CRON[605481]: pam_unix(cron:session): session closed for user root
Oct  4 17:55:01 ssjiang CRON[605480]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:56:01 ssjiang CRON[644500]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:56:02 ssjiang CRON[644500]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:56:04 ssjiang CRON[605479]: pam_unix(cron:session): session closed for user root
Oct  4 17:57:01 ssjiang CRON[645149]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:57:02 ssjiang CRON[645149]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:58:01 ssjiang CRON[645158]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:58:01 ssjiang CRON[645158]: pam_unix(cron:session): session closed for user www-data
Oct  4 17:59:01 ssjiang CRON[645168]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 17:59:02 ssjiang CRON[645168]: pam_unix(cron:session): session closed for user www-data
Oct  4 18:00:01 ssjiang CRON[645181]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 18:00:01 ssjiang CRON[645182]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 18:00:01 ssjiang CRON[645179]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 18:00:01 ssjiang CRON[645180]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 18:00:01 ssjiang CRON[645182]: pam_unix(cron:session): session closed for user root