getgrenam(“user”)在/etc/nginx/nginx.conf中失败

我试图以当前用户(= ayush)运行nginx.但是在设置user指令时出现以下错误：

Dec 11 22:26:13 manjaro nginx[17194]: 2015/12/11 22:26:13 [emerg] 17194#0: getgrnam("ayush") failed in /etc/nginx/nginx.conf:1
Dec 11 22:26:13 manjaro systemd[1]: nginx.service: Control process exited,code=exited status=1

我的nginx.conf：

user ayush;
worker_processes 1;

error_log  /var/log/nginx/error.log;
events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #access_log  logs/access.log  main;

    sendfile        on;
    keepalive_timeout  65;

    server {
        listen       80;
        server_name  localhost;


        location / {
            root   /code/server;
            autoindex on;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   /usr/share/nginx/html;
        }
    }
}

也：

ayush@manjaro ~> whoami
ayush