Increase TimeoutStartSec for Apache on a Centos7/RHEL7 server

For this, increase its value in the following file.

$ cat /etc/systemd/system/httpd.service.d/override.conf
TimeoutStartSec=240

Adding it in seconds. So convert minutes to seconds first.

Use TimeoutStartSec, TimeoutStopSec or TimeoutSec to specify how long the timeout should be for starting and stopping the process.