清空日志后，nginx启动不了了

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日志老是变大 占满了整个 var 分区 famp没有自动删除日志的功能 只好定期手动删除  今天删除日志后，nginx就不能启动了

www# /webserver-restart
httpd (no pid file) not running
spawn-fcgi.c.197: child spawned successfully: PID: 1451
spawn-fcgi.c.127: bind failed: Address already in use
spawn-fcgi.c.127: bind failed: Address already in use

该怎么解决呀

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我是用这个清空的 rm -rf /var/log/nginx*