Sometimes we acidentally spawn a series of processes, and we want to kill them. We can look up their pid's through ps -aux | grep <process_name> (as shown below) and manually run the kill command to kill each process by providing its pid, but how can we automate this tedious task ?
1 2 3 4 5 6 7 8 9 10 $ ps aux | grep pipreqs
First, we can add grep -v grep to the pipe to hide the grep processes from the output :
1 2 3 4 5 6 7 8 9 $ ps aux | grep pipreqs | grep -v grep
Then, we can add awk '{print $2}' to the pipe to invoke awk to trim the second space-delimited component (which in this case is the pid). Now we have a list of the pid's of the processes we want to kill:
1 2 3 4 5 6 7 8 9 $ ps aux | grep pipreqs | grep -v grep | awk '{print $2}'
Finally, we can iterate over the pid's in a for-loop to kill them.
1 2 3 4 $ for pid in $(ps aux | grep pipreqs | grep -v grep | awk '{print $2}' )do kill -15 $pid done
References
https://www.baeldung.com/linux/grep-exclude-ps-results https://stackoverflow.com/questions/46008880/how-to-always-cut-the-pid-from-ps-aux-command