Oct  8 13:20:03 ssjiang CRON[2702353]: pam_unix(cron:session): session closed for user root
Oct  8 13:21:01 ssjiang CRON[2742525]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:21:01 ssjiang CRON[2702354]: pam_unix(cron:session): session closed for user root
Oct  8 13:21:01 ssjiang CRON[2742525]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:22:02 ssjiang CRON[2742806]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:22:02 ssjiang CRON[2742806]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:23:01 ssjiang CRON[2742815]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:23:02 ssjiang CRON[2742815]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:24:01 ssjiang CRON[2742824]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:24:01 ssjiang CRON[2742824]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:25:01 ssjiang CRON[2742835]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  8 13:25:01 ssjiang CRON[2742834]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:25:01 ssjiang CRON[2742833]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  8 13:25:01 ssjiang CRON[2742835]: pam_unix(cron:session): session closed for user root
Oct  8 13:25:02 ssjiang CRON[2742834]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:26:01 ssjiang CRON[2742833]: pam_unix(cron:session): session closed for user root
Oct  8 13:26:01 ssjiang CRON[2783273]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:26:01 ssjiang CRON[2783273]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:27:01 ssjiang CRON[2783282]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:27:02 ssjiang CRON[2783282]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:28:01 ssjiang CRON[2783291]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:28:02 ssjiang CRON[2783291]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:29:01 ssjiang CRON[2783301]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:29:01 ssjiang CRON[2783301]: pam_unix(cron:session): session closed for user www-data
Oct  8 13:30:01 ssjiang CRON[2783313]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  8 13:30:01 ssjiang CRON[2783312]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  8 13:30:01 ssjiang CRON[2783310]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  8 13:30:01 ssjiang CRON[2783313]: pam_unix(cron:session): session closed for user root
Oct  8 13:30:01 ssjiang CRON[2783311]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  8 13:30:02 ssjiang CRON[2783312]: pam_unix(cron:session): session closed for user www-data