Apache HTTPD Server
The A in LAMP is the Apache httpd web serverApache Service
You can start stop or restart the Apache serviceCentOS/Orac/RHEL
# service httpd [start | stop | restart]
Ed/X/Ubuntu
# /etc/init.d/apache2 [start | stop | restart]
httpd.conf
The main global configuration file for your Apache instance is httpd.conf.htaccess
local .htaccess (HtAccess) files can override settings in your master httpd.conf file is you have enabled AllowOverideApache Modules
ApacheModules are plugins / extensions / modules that are optionally used by ApacheServer Side Includes
ServerSideIncludesREFERRERS
SystemServices
