fedora 35需要搭建一个文件http服务器，
安装：
$ sudo dnf install httpd
实际上是一个apache服务器
配置文件：/etc/httpd/conf/httpd.conf
修改用户和主目录：
User yuanjianpeng
Group yuanjianpeng
DocumentRoot "/work/tftproot"
<Directory "/work/tftproot">
Options ALL
AllowOverride None
# Allow open access:
Require all granted
</Directory>
重启：
$ sudo systemctl restart httpd
You don't have permission to access this resource.
查看日志：/etc/httpd/logs/
[Sat Dec 09 14:06:19.782353 2023] [autoindex:error] [pid 75614:tid 75759] (13)Permission denied: [client 127.0.0.1:47620] AH01275: Can't open directory for index: /a/b/
[Sat Dec 09 14:06:25.093012 2023] [core:error] [pid 75611:tid 75661] (13)Permission denied: [client 127.0.0.1:47628] AH00035: access to /123 denied (filesystem path '/a/b/123') because search permissions are missing on a component of the path
研究了半天，以为是文件系统权限的问题，加了权限还是不好使，原来是selinux搞的鬼，关掉就好了：
$ setenforce 0
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