Dec 11 06:25:02 alva su[25327]: Successful su for nobody by root
Dec 11 06:25:02 alva su[25327]: + ??? root:nobody
Dec 11 06:25:02 alva su[25327]: (pam_unix) session opened for user nobody by (uid=0)
Dec 11 06:25:02 alva su[25327]: (pam_unix) session closed for user nobody
Dec 11 06:25:02 alva su[25329]: Successful su for nobody by root
Dec 11 06:25:02 alva su[25329]: + ??? root:nobody
Dec 11 06:25:02 alva su[25329]: (pam_unix) session opened for user nobody by (uid=0)
Dec 11 06:25:02 alva su[25329]: (pam_unix) session closed for user nobody
Dec 11 06:25:02 alva su[25331]: Successful su for nobody by root
Dec 11 06:25:02 alva su[25331]: + ??? root:nobody
Dec 11 06:25:02 alva su[25331]: (pam_unix) session opened for user nobody by (uid=0)
Dec 11 06:25:03 alva su[25331]: (pam_unix) session closed for user nobody
Dec 11 06:25:26 alva CRON[24940]: (pam_unix) session closed for user root