[root@web02 conf]# /application/nginx/sbin/nginx -t
nginx: the configuration file /application/nginx-1.6.3/conf/nginx.conf syntax is ok
nginx: configuration file /application/nginx-1.6.3/conf/nginx.conf test is successful

[root@web02 conf]# /application/nginx/sbin/nginx -s reload
nginx: [error] invalid PID number "" in "/application/nginx-1.6.3/logs/nginx.pid"
启动的时候报错

解决办法
其实原因是找不到配置文件 需要指定一下

[root@web02 conf]# /application/nginx/sbin/nginx -c /application/nginx/conf/nginx.conf[root@web02 conf]# /application/nginx/sbin/nginx -s reload