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Linux find php file by process id

Sometimes on dedicated hosting, there can be some scripts that will start consuming 100% of CPU and all the websites will stop working.

We can find out the process list using this command:

top -i

It will tell us the process id, but still, we won’t be able to find out which PHP file might have created this process.

sudo lsof -p PID(process id which is taking up cpu)

This will show a list of files that are using this particular process. And anything matching your apache root directory (mostly /var/www/html/….) is the culprit.

** you might need to install lsof using :

sudo apt-get install lsof

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