检测是否为selinux导致httpd启动失败，若setenforce 0以后就可以启动，就表示selinux配置不当。
首先本机要支持semanage命令，安装方法网上有。
semanage port -l | grep http //查看润徐httpd的端口
[root@localhost logs]# semanage port -l | grep http http_cache_port_t tcp 3128, 8080, 8118, 11211, 10001-10010 http_cache_port_t udp 3130, 11211 http_port_t tcp 80, 443, 488, 8008, 8009, 8443 pegasus_http_port_t tcp 5988 pegasus_https_port_t tcp 5989
semanage port -a -t http_port_t -p tcp 81 //添加81端口
http_port_t tcp 81, 80, 443, 488, 8008, 8009, 8443
再看就有了，然后
[root@localhost logs]# setenforce 1 [root@localhost logs]# service httpd start Starting httpd: [root@localhost logs]# service httpd status httpd (pid 21673) is running...
开机启动
chkconfig httpd on
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页面错误
httpd You don't have permission to access / on this server.
日志显示
Permission denied: /home/airc/.htaccess pcfg_openfile: unable to check htaccess file, ensure it is readable
解决
chmod -R 755 /home/airc/
原因DocumentRoot的父目录权限错误