Oct  4 12:50:03 ssjiang CRON[2376912]: pam_unix(cron:session): session closed for user root
Oct  4 12:51:01 ssjiang CRON[2403545]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:51:02 ssjiang CRON[2403545]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:51:32 ssjiang CRON[2376913]: pam_unix(cron:session): session closed for user root
Oct  4 12:52:01 ssjiang CRON[2416584]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:52:01 ssjiang CRON[2416584]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:53:01 ssjiang CRON[2416593]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:53:02 ssjiang CRON[2416593]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:54:01 ssjiang CRON[2416603]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:54:02 ssjiang CRON[2416603]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:55:01 ssjiang CRON[2416612]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 12:55:01 ssjiang CRON[2416613]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:55:01 ssjiang CRON[2416614]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 12:55:01 ssjiang CRON[2416614]: pam_unix(cron:session): session closed for user root
Oct  4 12:55:02 ssjiang CRON[2416613]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:56:01 ssjiang CRON[2453222]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:56:01 ssjiang CRON[2453222]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:56:09 ssjiang CRON[2416612]: pam_unix(cron:session): session closed for user root
Oct  4 12:57:01 ssjiang CRON[2456281]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:57:02 ssjiang CRON[2456281]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:58:01 ssjiang CRON[2456290]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:58:02 ssjiang CRON[2456290]: pam_unix(cron:session): session closed for user www-data
Oct  4 12:59:01 ssjiang CRON[2456300]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 12:59:02 ssjiang CRON[2456300]: pam_unix(cron:session): session closed for user www-data
Oct  4 13:00:01 ssjiang CRON[2456309]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 13:00:01 ssjiang CRON[2456312]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  4 13:00:01 ssjiang CRON[2456311]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  4 13:00:01 ssjiang CRON[2456312]: pam_unix(cron:session): session closed for user root
Oct  4 13:00:01 ssjiang CRON[2456310]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)