禁止nginx使用端口80

Question

我的nginx 1.8版本安装在/etc/nginx 下

当我启动nginx时，我得到以下端口已经在使用错误。

sudo systemctl start nginx
Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
$ systemctl status nginx.service
● nginx.service - nginx - high performance web server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2020-11-27 06:24:18 UTC; 6s ago
Docs: http://nginx.org/en/docs/
Process: 24226 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)
Nov 27 06:24:16 efendibey_live nginx[24226]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 27 06:24:16 efendibey_live nginx[24226]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 27 06:24:17 efendibey_live nginx[24226]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 27 06:24:17 efendibey_live nginx[24226]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 27 06:24:18 efendibey_live nginx[24226]: nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)
Nov 27 06:24:18 efendibey_live nginx[24226]: nginx: [emerg] still could not bind()
Nov 27 06:24:18 efendibey_live systemd[1]: nginx.service: control process exited, code=exited status=1
Nov 27 06:24:18 efendibey_live systemd[1]: Failed to start nginx - high performance web server.
Nov 27 06:24:18 efendibey_live systemd[1]: Unit nginx.service entered failed state.
Nov 27 06:24:18 efendibey_live systemd[1]: nginx.service failed.
$

我确定nginx.conf或/etc/nginx/conf.d/default.conf中没有指定端口80。事实上，nginx主目录下的任何文件中都没有端口80。

cd /etc/nginx
find . -name "*" | xargs grep 80

输出：

grep: .: Is a directory
grep: ./conf.d: Is a directory
grep: ./default.d: Is a directory
grep: ./certs: Is a directory
grep: ./modules: Is a directory
./conf.d/default.conf:    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
./certs/efendibey.de_privatekey.txt:Lm4er4hrt7PhgBir4DWC/bDOIIlhPdXWCr80v2V9hFdTc0CxDA39/ILl054Jjp4L
./certs/ca_bundle.crt:2SAeepyImJ2CzB80YG7WxlynHqNhpE7xfC7PzQlLgmfEHdU+tHFeQazRQnrFkW2W
./nginx.conf:        listen       [::]:7080 ipv6only=on default_server;
./win-utf:    82  E2809A ; # single low-9 quotation mark
./win-utf:    84  E2809E ; # double low-9 quotation mark
./win-utf:    85  E280A6 ; # ellipsis
./win-utf:    86  E280A0 ; # dagger
./win-utf:    87  E280A1 ; # double dagger
./win-utf:    89  E280B0 ; # per mille
./win-utf:    91  E28098 ; # left single quotation mark
./win-utf:    92  E28099 ; # right single quotation mark
./win-utf:    93  E2809C ; # left double quotation mark
./win-utf:    94  E2809D ; # right double quotation mark
./win-utf:    95  E280A2 ; # bullet
./win-utf:    96  E28093 ; # en dash
./win-utf:    97  E28094 ; # em dash
./win-utf:    F0  D180 ;   # small r
./koi-utf:    80  E282AC ; # euro
./koi-utf:    95  E280A2 ; # bullet
./koi-utf:    D2  D180 ;   # small r
./koi-win:    80  88 ; # euro

此外，

$ grep server *.* conf.d/*.*
grep: conf.d: Is a directory
grep: default.d: Is a directory
nginx.conf:    server {
nginx.conf:        listen       [::]:7080 ipv6only=on default_server;
nginx.conf:        server_name 199.247.23.57;
nginx.conf:    server {
nginx.conf:#    server_name efendibey.de; # managed by Certbot
nginx.conf:    server_name 199.247.23.57
conf.d/default.conf:server {
conf.d/default.conf:    server_name  localhost;
conf.d/default.conf:    # redirect server error pages to the static page /50x.html
conf.d/default.conf:    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000

当我释放端口80时，nginx能够成功启动。

你能告诉我nginx为什么在哪里挑选80号端口吗？

Answer 1

您需要在nginx配置的所有server块中显式指定侦听端口(您可以使用nginx -T命令检查所有包含的文件(，因为正如listen指令文档所述：

如果指令不存在，则如果nginx以超级用户权限运行，则使用*:80，否则使用*:8000。