Oct  5 03:50:03 ssjiang CRON[1145644]: pam_unix(cron:session): session closed for user root
Oct  5 03:51:01 ssjiang CRON[1183339]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:51:02 ssjiang CRON[1183339]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:51:08 ssjiang CRON[1145645]: pam_unix(cron:session): session closed for user root
Oct  5 03:52:01 ssjiang CRON[1185494]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:52:01 ssjiang CRON[1185494]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:53:01 ssjiang CRON[1185504]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:53:02 ssjiang CRON[1185504]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:54:01 ssjiang CRON[1185514]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:54:02 ssjiang CRON[1185514]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:55:01 ssjiang CRON[1185523]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  5 03:55:01 ssjiang CRON[1185525]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  5 03:55:01 ssjiang CRON[1185524]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:55:01 ssjiang CRON[1185525]: pam_unix(cron:session): session closed for user root
Oct  5 03:55:01 ssjiang CRON[1185524]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:56:01 ssjiang CRON[1223708]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:56:02 ssjiang CRON[1223708]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:56:07 ssjiang CRON[1185523]: pam_unix(cron:session): session closed for user root
Oct  5 03:57:01 ssjiang CRON[1225369]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:57:02 ssjiang CRON[1225369]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:58:01 ssjiang CRON[1225378]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:58:02 ssjiang CRON[1225378]: pam_unix(cron:session): session closed for user www-data
Oct  5 03:59:01 ssjiang CRON[1225388]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 03:59:01 ssjiang CRON[1225388]: pam_unix(cron:session): session closed for user www-data
Oct  5 04:00:01 ssjiang CRON[1225397]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  5 04:00:01 ssjiang CRON[1225400]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  5 04:00:01 ssjiang CRON[1225399]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  5 04:00:01 ssjiang CRON[1225400]: pam_unix(cron:session): session closed for user root
Oct  5 04:00:01 ssjiang CRON[1225398]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)