Install libapache2-mod-watchcat by entering the following commands in the terminal:
sudo apt update sudo apt install libapache2-mod-watchcat
Description:
Process monitoring Apache module
A bug or malicious attacks to machine can lock up a process, leading to a deadlock or an unexpected condition. For example: an Apache httpd with mod_(php|perl|lua|your_preferred_script_language) running a bad script. When the monitored process locks up, the watchcat helps killing him. It is the best thing to do.
Homepage: http://oss.digirati.com.br/mod_watchcat/
Version: 1.1.2-1
Section: universe/web