Linux下清除系统日志的方法

#!/bin/sh 
cat /dev/null > /var/log/syslog 
cat /dev/null > /var/adm/sylog 
cat /dev/null > /var/log/wtmp 
cat /dev/null > /var/log/maillog 
cat /dev/null > /var/log/messages 
cat /dev/null > /var/log/openwebmail.log 
cat /dev/null > /var/log/maillog 
cat /dev/null > /var/log/secure 
cat /dev/null > /var/log/httpd/error_log 
cat /dev/null > /var/log/httpd/ssl_error_log 
cat /dev/null > /var/log/httpd/ssl_request_log 
cat /dev/null > /var/log/httpd/ssl_access_log