1、Linux或windows #使用域名
hosts（linux或windows） 没有解析
[root@web01 /etc/nginx]# curl blog.oldboy.com <a href="https://www.afternic.com/forsale/blog.oldboy.com?utm_source=TDFS_
DASLNC&utm_medium=DASLNC&utm_campaign=TDFS_DASLNC&traffic_type=TDFS_DASLNC&traffic_id=daslnc&">Found</a>.
2、Connection refused #连接拒绝
检查nginx服务是否启动，systemctl status nginx
root@web01 /etc/nginx]# curl www.oldboy.com curl: (7) Failed connect to www.oldboy.com:80; Connection refused
3、Address already in use #nginx正在运行中
[root@web01 ~]# nginx nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] still could not bind()
4、journalctl -xe
启动或重启nginx 的报错
[root@web-204 html]# 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.
解决： 1>直接在命令行journalctl -xe查看详细的错误提示 2>用nginx -t 检查语法是否错误
[root@web-204 html]# nginx -t nginx: [emerg] unexpected "}" in /etc/nginx/nginx.conf:49 nginx: configuration file /etc/nginx/nginx.conf test failed }不成对
5、configuration file /etc/nginx/nginx.conf test failed
server_name 这一行 没有以 ";" 结尾 terminated 结束
[root@wed01 ~]# nginx -t nginx: [emerg] directive "server_name" is not terminated by ";" in /etc/nginx/nginx.conf:43 nginx: configuration file /etc/nginx/nginx.conf test failed
6、403 Forbidden #被拒绝
1>网站首页的权限拒绝 2>网站首页不存在（默认找首页文件）
[root@web01 /usr/share/nginx/html/blog]# curl blog.oldboy.com <html> <head><title>403 Forbidden</title></head> <body> <center><h1>403 Forbidden</h1></center> <hr><center>nginx/1.16.0</center> </body> </html>
7、404 Not Found #请求的资源不存在
站点目录下没有aaa.html这个文件
[root@web01 /usr/share/nginx/html/www]# curl www.oldboy.com/aaa.html <html> <head><title>404 Not Found</title></head> <body> <center><h1>404 Not Found</h1></center> <hr><center>nginx/1.16.0</center> </body> </html>
8、Cannot assign requested address #无法分配指定的ip地址
本地没有10.0.0.9这个ip
[root@web01 /etc/nginx]# nginx -t nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: [emerg] bind() to 10.0.0.9:80 failed (99: Cannot assign requested address) nginx: configuration file /etc/nginx/nginx.conf test failed
解决：ip addr add 10.0.0.9/24 dev eth0 label eth0:1
9、conflicting server name #域名冲突
有两个几个 虚拟主机的域名相同了
[root 12:27:17 @web01 conf.d]# nginx -t nginx: [warn] conflicting server name "www.oldboy.com" on 0.0.0.0:80, ignored nginx: the configuration file /etc/nginx/nginx.conf syntax is ok nginx: configuration file /etc/nginx/nginx.conf test is successful
解决：用grep检索查询server标签文件中存在
10、File not found 找不到文件
1>检查nginx的配置是否有误 2>当后缀为php时，给秘书php-fpm没有指定站点目录
[root@web01 /etc/nginx/conf.d]# curl www.new1983.com/info.php File not found.
11、journalctl -xe
[root@web01 /etc/php-fpm.d]# systemctl restart php-fpm.service Job for php-fpm.service failed because the control process exited with error code. See "systemctl status php-fpm.service" and "journalctl -xe" for details. [root@web01 /etc/php-fpm.d]#
12、502 Bad Gateway
测试nginx与php是否联通时，出现的这个错 原因： 1>php-fpm.service服务没有启动，启动或重启即可
13、Can’t select database 不能选择数据库
在系统中没有创建数据库
13、Error establishing a database connection #建立数据库连接时出错
1>站点目录连接数据库的账号、密码错误
14、user nginx is currently used by process 7259 #用户nginx当前由进程7259使用
删除nginx用户时，提示该用户正在被7259进程使用
[root@web02 ~]# userdel nginx userdel: user nginx is currently used by process 7259
解决：先停止使用该用户的服务systemctl stop nginx php-fpm.service，再删除
15、401 Authorization Required
需要授权的意思，一般是认证失败（用户名和密码）
16、500 Internal Server Error
内部服务器错误或程序错误
17、No route to host #无法到达主机
原因： 1>防火墙、SELinux