snort실행시 에러

root     20777     1  0 18:33 ?        00:00:01 /usr/local/bin/snort -d -D -c /usr/local/snort/etc/snort

보기와 같이 실행후에 /var/snort/log를 보면

[root@localhost snort]# ls
alert  portscan.log  snort.log.1147770338  snort.log.1147772024 와같이 로그들이 있구요

로그를 확인하기 위해서

[root@localhost snort]# snort -r snort.log.1147772024
No run mode specified, defaulting to verbose mode
Running in packet dump mode
TCPDUMP file reading mode.
Reading network traffic from "snort.log.1147772024" file.
ERROR: unable to open file "snort.log.1147772024" for readback: fread: Success
Fatal Error, Quitting..

위와같은 메세지가 나옵니다 저게 무슨의미인지..잘모르겟군요..