Oct  7 13:20:02 ssjiang CRON[3638785]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:20:02 ssjiang CRON[3638783]: pam_unix(cron:session): session closed for user root
Oct  7 13:21:01 ssjiang CRON[3678224]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:21:02 ssjiang CRON[3678224]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:21:05 ssjiang CRON[3638784]: pam_unix(cron:session): session closed for user root
Oct  7 13:22:01 ssjiang CRON[3678996]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:22:02 ssjiang CRON[3678996]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:23:01 ssjiang CRON[3679005]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:23:01 ssjiang CRON[3679005]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:24:01 ssjiang CRON[3679014]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:24:02 ssjiang CRON[3679014]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:25:01 ssjiang CRON[3679025]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 13:25:01 ssjiang CRON[3679023]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 13:25:01 ssjiang CRON[3679024]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:25:01 ssjiang CRON[3679025]: pam_unix(cron:session): session closed for user root
Oct  7 13:25:02 ssjiang CRON[3679024]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:26:01 ssjiang CRON[3718371]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:26:02 ssjiang CRON[3718371]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:26:05 ssjiang CRON[3679023]: pam_unix(cron:session): session closed for user root
Oct  7 13:27:01 ssjiang CRON[3719233]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:27:02 ssjiang CRON[3719233]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:28:01 ssjiang CRON[3719242]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:28:02 ssjiang CRON[3719242]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:29:01 ssjiang CRON[3719252]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:29:01 ssjiang CRON[3719252]: pam_unix(cron:session): session closed for user www-data
Oct  7 13:30:01 ssjiang CRON[3719262]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 13:30:01 ssjiang CRON[3719261]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 13:30:01 ssjiang CRON[3719263]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 13:30:01 ssjiang CRON[3719264]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 13:30:01 ssjiang CRON[3719264]: pam_unix(cron:session): session closed for user root
Oct  7 13:30:02 ssjiang CRON[3719263]: pam_unix(cron:session): session closed for user www-data