HTTPD (Apache) Program Environment configuration file

CentOS 6:httpd-2.2
Program Environment:
Configuration file:
/etc/httpd/conf/httpd.conf
/etc/httpd/conf.d/*.conf
Service script:
/etc/rc.d/init.d/httpd
Script configuration file:/etc/sysconfig/httpd
Main Program Files:
/usr/sbin/httpd
/usr/sbin/httpd.event
/usr/sbin/httpd.worker
Log file:
/VAR/LOG/HTTPD:
Access_log: Access Log
Error_log: Error Log
Site Documentation:
/var/www/html
Module file path:
/usr/lib64/httpd/modules

Service Control and Startup:
Chkconfig httpd On|off
Service {Start|stop|restart|status|configtest|reload} httpd

CentOS 7:httpd-2.4
Program Environment:
Configuration file:
/etc/httpd/conf/httpd.conf
/etc/httpd/conf.d/*.conf
Module-related configuration files:/etc/httpd/conf.modules.d/*.conf
SYSTEMD Unit File:
/usr/lib/systemd/system/httpd.service
Main Program Files:
/usr/sbin/httpd
httpd-2.4 supports MPM dynamic switching;
Log file:
/VAR/LOG/HTTPD:
Access_log: Access Log
Error_log: Error Log
Site Documentation:
/var/www/html
Module file path:
/usr/lib64/httpd/modules

Service Control:
Systemctl enable|disable Httpd.service
Systemctl {Start|stop|restart|status} httpd.service

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HTTPd (Apache) Program Environment configuration file