If you started a long-running PHP script as a cron job and wish to terminate it for whatever reason. Here is what you can do.
Step 1: Run the following command to find the Process ID
ps -ef | grep php
“ps -ef” is basically to show all (-e) processes in full details (-f) and the output is pipe (with ’|’) through “grep php” to find all processes with the word “php”. From the output, you should be able to identify the process and its ID.
Step 2: Kill it with the following command
kill -9 <pid>