service httpd status
Failed to start The Apache HTTP Server.
less /var/log/messages
例えば次のようなエラーがある場合
httpd: httpd: Syntax error on line 56 of /etc/httpd/conf/httpd.conf:
Syntax error on line 7 of /etc/httpd/conf.modules.d/00-proxy.conf:
Cannot load modules/mod_proxy_ajp.so into server:
/etc/httpd/modules/mod_proxy_ajp.so: undefined symbol: ap_proxy_check_connection
該当の設定ファイルを修正します。
service httpd status
service httpd start