Services
Systemctl
Subcommands of Systemctl you can run to check status of the httpd service:
systemctl status httpd
systemctl start httpd
systemctl stop httpd
systemctl restart httpd
systemctl reload httpd
systemctl enable httpd
systectl disable httpd
systemctl is-active httpd
systemctl is-enabled httpd
Where the config file is created for httpd when it is installed on CentOS/RHEL: