Command
sudo apache2ctl -V | grep -i mpmExplanation
Displays which Multi-Processing Module is being used (prefork, worker, or event).
Examples
Check current MPM
sudo apache2ctl -V | grep -i mpmsudo apache2ctl -V | grep -i mpmDisplays which Multi-Processing Module is being used (prefork, worker, or event).
Check current MPM
sudo apache2ctl -V | grep -i mpm