我运行 Arch Linux，当我运行时：
sudo systemctl start nginx.service
我在日记中收到以下消息：
nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Wed 2019-05-15 11:17:03 BST; 45s ago
Process: 1542 ExecStart=/usr/bin/nginx -g pid /run/nginx.pid; error_log stderr; (code=exited, status=1/FAILURE)
May 15 11:17:03 systemd[1]: Starting A high performance web server and a reverse proxy server...
May 15 11:17:03 nginx[1542]: 2019/05/15 11:17:03 [emerg] 1542#1542: a duplicate listen 0.0.0.0:80 in /etc/nginx/nginx.conf:42
May 15 11:17:03 systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
May 15 11:17:03 systemd[1]: nginx.service: Failed with result 'exit-code'.
May 15 11:17:03 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
我不明白这里的错误。我该如何解决？
更新
● nginx.service - A high performance web server and a reverse proxy server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Wed 2019-05-15 11:36:36 BST; 9s ago
Process: 1667 ExecStart=/usr/bin/nginx -g pid /run/nginx.pid; error_log stderr; (code=exited, status=1/FAILURE)
May 15 11:36:36 systemd[1]: Starting A high performance web server and a reverse proxy server...
May 15 11:36:36 nginx[1667]: 2019/05/15 11:36:36 [emerg] 1667#1667: getpwnam("www-data") failed in /etc/nginx/nginx.conf:3
May 15 11:36:36 systemd[1]: nginx.service: Control process exited, code=exited, status=1/FAILURE
May 15 11:36:36 systemd[1]: nginx.service: Failed with result 'exit-code'.
May 15 11:36:36 systemd[1]: Failed to start A high performance web server and a reverse proxy server.
答案1
还有其他东西监听端口 80，检查行：
duplicate listen 0.0.0.0:80
要查看哪个 PID 监听，您可以尝试
netstat -anp|grep :80
如果 nginx 配置有问题，你可以尝试这个最小的配置：
daemon on;
worker_processes 2;
user www-data;
events {
use epoll;
worker_connections 128;
}
error_log logs/error.log info;
http {
server_tokens off;
include mime.types;
charset utf-8;
access_log logs/access.log combined;
server {
server_name localhost;
listen *:80;
error_page 500 502 503 504 /50x.html;
location / {
root html;
}
}
}