nginx启动前测试问题

[root@lnmp02 conf]# id nginx
uid=501(nginx) gid=501(nginx) 组=501(nginx)
[root@lnmp02 conf]# /application/nginx/sbin/nginx -t
nginx: the configuration file /application/nginx-1.6.3/conf/nginx.conf syntax is ok
nginx: [emerg] getpwnam("=nginx") failed
nginx: configuration file /application/nginx-1.6.3/conf/nginx.conf test failed
[root@lnmp02 conf]#
请问这是为什么呢？