I run a bash script with which start a python script to run in background
#!/bin/bash
python test.py &
So how i can i kill the script with bash script also?
I used the following command to kill but output no process found
killall $(ps aux | grep test.py | grep -v grep | awk '{ print $1 }')
I try to check the running processes by ps aux | less and found that the running script having command of python test.py
Please assist, thank you!
Use pkill command as
pkill -f test.py
(or) a more fool-proof way using pgrep to search for the actual process-id
kill $(pgrep -f 'python test.py')
Or if more than one instance of the running program is identified and all of them needs to be killed, use killall(1) on Linux and BSD
killall test.py
You can use the ! to get the PID of the last command.
I would suggest something similar to the following, that also check if the process you want to run is already running:
#!/bin/bash
if [[ ! -e /tmp/test.py.pid ]]; then # Check if the file already exists
python test.py & #+and if so do not run another process.
echo $! > /tmp/test.py.pid
else
echo -n "ERROR: The process is already running with pid "
cat /tmp/test.py.pid
echo
fi
Then, when you want to kill it:
#!/bin/bash
if [[ -e /tmp/test.py.pid ]]; then # If the file do not exists, then the
kill `cat /tmp/test.py.pid` #+the process is not running. Useless
rm /tmp/test.py.pid #+trying to kill it.
else
echo "test.py is not running"
fi
Of course if the killing must take place some time after the command has been launched, you can put everything in the same script:
#!/bin/bash
python test.py & # This does not check if the command
echo $! > /tmp/test.py.pid #+has already been executed. But,
#+would have problems if more than 1
sleep(<number_of_seconds_to_wait>) #+have been started since the pid file would.
#+be overwritten.
if [[ -e /tmp/test.py.pid ]]; then
kill `cat /tmp/test.py.pid`
else
echo "test.py is not running"
fi
If you want to be able to run more command with the same name simultaneously and be able to kill them selectively, a small edit of the script is needed. Tell me, I will try to help you!
With something like this you are sure you are killing what you want to kill. Commands like pkill or grepping the ps aux can be risky.
ps -ef | grep python
it will return the "pid" then kill the process by
sudo kill -9 pid
eg output of ps command: user 13035 4729 0 13:44 pts/10 00:00:00 python (here 13035 is pid)
kill -9 command has a different behaviour from kill. Pay attention when using the -9 option.With the use of bashisms.
#!/bin/bash
python test.py &
kill $!
$! is the PID of the last process started in background. You can also save it in another variable if you start multiple scripts in the background.
killall python3
will interrupt any and all python3 scripts running.
ps?