bash - Kill a processes if it has been running for more than one hour

urek mazino

11/7/23, 12:27 PM

I have this bash script that runs a python program in Ubuntu server every 5 minutes if not already running , I want to make it kill the program if it has been running for more than one hour and rerun it.

#!/bin/bash

if pgrep -f "/home/user/crawler/panel/crawler/scans.py"
then
    echo "script running"
    # Command when the script is runnung
else
    echo "script not running"
    /home/user/crawler/env/bin/python /home/user/crawler/panel/crawler/scans.py
fi

692

1 + 2

python

command-line

bash

scripts

steeldriver

11/7/23, 1:53 PM

You may find the `timeout` program useful - see for example [Run and kill a bash program at a scheduled time](https://askubuntu.com/questions/1005636/run-and-kill-a-bash-program-at-a-scheduled-time)

urek mazino

11/7/23, 5:07 PM

that what i ended using , simple and onky need to edit one line

Score:0

Ubuntu

Raffa

11/7/23, 1:55 PM

I modified your provided script to do what you want (quickly cooked but should do the job) ... I tried to comment as much as I thought needed, so please read the comments in the script below.

#!/bin/bash

if pgrep -f "/home/user/crawler/panel/crawler/scans.py"
then
    echo "script running"
    process_id=$(pgrep -f "/home/user/crawler/panel/crawler/scans.py") # Get the PID
    process_time=$(ps -p "$process_id" -o etime | awk -F":" 'NR==2 && NF>2{print 1}') # Get process elapsed time and print "1" if more than an houer
    [ "$process_time" == 1 ] && kill "$process_id" && /home/user/crawler/env/bin/python /home/user/crawler/panel/crawler/scans.py # If the process has been running for more than one hour then kill it and run the script again
    # Command when the script is runnung
else
    echo "script not running"
    /home/user/crawler/env/bin/python /home/user/crawler/panel/crawler/scans.py
fi

+ 2

urek mazino

11/7/23, 5:06 PM

i ended using timeout function before running the python script and seems working so far , I'll keep your solution as secondary plan

Raffa

11/8/23, 6:50 AM

@urekmazino I am happy to help, but there is one important thing that you should keep in mind though … While `timeout` will work to kill your python program after one hour, there will be times when it will not be running for up to five minutes until your bash script runs it again … But my solution will kill it and then run it immediately thus minimizing down time :-)

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: bash - Kill a processes if it has been running for more than one hour

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