Oct  7 03:20:03 ssjiang CRON[2983646]: pam_unix(cron:session): session closed for user root
Oct  7 03:21:01 ssjiang CRON[3023228]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:21:02 ssjiang CRON[3023228]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:21:04 ssjiang CRON[2983647]: pam_unix(cron:session): session closed for user root
Oct  7 03:22:01 ssjiang CRON[3023857]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:22:01 ssjiang CRON[3023857]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:23:01 ssjiang CRON[3023866]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:23:02 ssjiang CRON[3023866]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:24:01 ssjiang CRON[3023875]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:24:02 ssjiang CRON[3023875]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:25:01 ssjiang CRON[3023884]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 03:25:01 ssjiang CRON[3023885]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:25:01 ssjiang CRON[3023886]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 03:25:01 ssjiang CRON[3023886]: pam_unix(cron:session): session closed for user root
Oct  7 03:25:01 ssjiang CRON[3023885]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:26:01 ssjiang CRON[3062836]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:26:02 ssjiang CRON[3062836]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:26:07 ssjiang CRON[3023884]: pam_unix(cron:session): session closed for user root
Oct  7 03:27:01 ssjiang CRON[3064091]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:27:01 ssjiang CRON[3064091]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:28:01 ssjiang CRON[3064100]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:28:02 ssjiang CRON[3064100]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:29:01 ssjiang CRON[3064110]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:29:02 ssjiang CRON[3064110]: pam_unix(cron:session): session closed for user www-data
Oct  7 03:30:01 ssjiang CRON[3064119]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 03:30:01 ssjiang CRON[3064122]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 03:30:01 ssjiang CRON[3064122]: pam_unix(cron:session): session closed for user root
Oct  7 03:30:01 ssjiang CRON[3064121]: pam_unix(cron:session): session opened for user www-data(uid=33) by (uid=0)
Oct  7 03:30:01 ssjiang CRON[3064120]: pam_unix(cron:session): session opened for user root(uid=0) by (uid=0)
Oct  7 03:30:01 ssjiang CRON[3064121]: pam_unix(cron:session): session closed for user www-data