Identity

Unit: apache2.service (Debian/Ubuntu), httpd.service (RHEL/Fedora/CentOS)
Config (Debian): /etc/apache2/apache2.conf, /etc/apache2/sites-available/, /etc/apache2/sites-enabled/, /etc/apache2/mods-available/, /etc/apache2/mods-enabled/, /etc/apache2/conf-available/
Config (RHEL): /etc/httpd/httpd.conf, /etc/httpd/conf.d/, /etc/httpd/conf.modules.d/
Logs: journalctl -u apache2 / journalctl -u httpd, /var/log/apache2/ (Debian), /var/log/httpd/ (RHEL)
User: www-data (Debian/Ubuntu), apache (RHEL/Fedora)
Distro install: apt install apache2 / dnf install httpd

Key Operations

Operation	Debian/Ubuntu	RHEL/Fedora
Status	`systemctl status apache2`	`systemctl status httpd`
Start	`sudo systemctl start apache2`	`sudo systemctl start httpd`
Stop	`sudo systemctl stop apache2`	`sudo systemctl stop httpd`
Reload (graceful)	`sudo systemctl reload apache2`	`sudo systemctl reload httpd`
Restart	`sudo systemctl restart apache2`	`sudo systemctl restart httpd`
Test config	`sudo apachectl configtest`	`sudo apachectl configtest`
Full config dump	`sudo apache2ctl -S`	`sudo httpd -S`