Oct  4 15:50:03 ssjiang CRON[3806650]: pam_unix(cron:session): session closed for user root
Oct  4 15:50:59 ssjiang CRON[3806651]: pam_unix(cron:session): session closed for user root
Oct  4 15:51:01 ssjiang CRON[3846314]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:51:02 ssjiang CRON[3846314]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:52:01 ssjiang CRON[3846323]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:52:02 ssjiang CRON[3846323]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:53:01 ssjiang CRON[3846332]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:53:01 ssjiang CRON[3846332]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:54:01 ssjiang CRON[3846342]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:54:02 ssjiang CRON[3846342]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:55:01 ssjiang CRON[3846351]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 15:55:01 ssjiang CRON[3846353]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 15:55:01 ssjiang CRON[3846352]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:55:01 ssjiang CRON[3846353]: pam_unix(cron:session): session closed for user root
Oct  4 15:55:02 ssjiang CRON[3846352]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:56:01 ssjiang CRON[3886003]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:56:01 ssjiang CRON[3846351]: pam_unix(cron:session): session closed for user root
Oct  4 15:56:01 ssjiang CRON[3886003]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:57:01 ssjiang CRON[3886020]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:57:02 ssjiang CRON[3886020]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:58:01 ssjiang CRON[3886030]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:58:02 ssjiang CRON[3886030]: pam_unix(cron:session): session closed for user www-data
Oct  4 15:59:01 ssjiang CRON[3886040]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 15:59:01 ssjiang CRON[3886040]: pam_unix(cron:session): session closed for user www-data
Oct  4 16:00:01 ssjiang CRON[3886052]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 16:00:01 ssjiang CRON[3886050]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 16:00:01 ssjiang CRON[3886051]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 16:00:01 ssjiang CRON[3886052]: pam_unix(cron:session): session closed for user root
Oct  4 16:00:01 ssjiang CRON[3886049]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)