Oct  6 04:50:01 ssjiang CRON[543661]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:50:02 ssjiang CRON[543659]: pam_unix(cron:session): session closed for user root
Oct  6 04:51:01 ssjiang CRON[582227]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:51:02 ssjiang CRON[582227]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:51:07 ssjiang CRON[543660]: pam_unix(cron:session): session closed for user root
Oct  6 04:52:01 ssjiang CRON[583690]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:52:01 ssjiang CRON[583690]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:53:01 ssjiang CRON[583699]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:53:02 ssjiang CRON[583699]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:54:01 ssjiang CRON[583709]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:54:02 ssjiang CRON[583709]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:55:01 ssjiang CRON[583718]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  6 04:55:01 ssjiang CRON[583720]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  6 04:55:01 ssjiang CRON[583719]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:55:01 ssjiang CRON[583720]: pam_unix(cron:session): session closed for user root
Oct  6 04:55:01 ssjiang CRON[583719]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:56:01 ssjiang CRON[623018]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:56:02 ssjiang CRON[623018]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:56:05 ssjiang CRON[583718]: pam_unix(cron:session): session closed for user root
Oct  6 04:57:01 ssjiang CRON[623746]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:57:01 ssjiang CRON[623746]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:58:01 ssjiang CRON[623755]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:58:02 ssjiang CRON[623755]: pam_unix(cron:session): session closed for user www-data
Oct  6 04:59:01 ssjiang CRON[623766]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 04:59:02 ssjiang CRON[623766]: pam_unix(cron:session): session closed for user www-data
Oct  6 05:00:01 ssjiang CRON[623775]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  6 05:00:01 ssjiang CRON[623778]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  6 05:00:01 ssjiang CRON[623778]: pam_unix(cron:session): session closed for user root
Oct  6 05:00:01 ssjiang CRON[623777]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  6 05:00:01 ssjiang CRON[623776]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)