如何杀死 Python 程序的所有进程？

Question

I am running a Python program service_host.py, which started multiple processes. And when I use ps -ef | grep python ps -ef | grep python

to check the pids, it shows a lot:

congmin  26968 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26969 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26970 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26971 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26972 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26973 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26974 22897  0 Jun20 ?        00:00:00 python service_host.py
congmin  26975 22897  0 Jun20 ?        00:00:00 python service_host.py

What's the best way to kill all these processes at once? I am on Linux and don't want to kill one by one through the process ID. Is there a way to kill them by the Python name 'service_host.py'? I tried this but it didn't kill at all:

import psutil

PROCNAME = "service_host.py"

for proc in psutil.process_iter():
    # check whether the process name matches
    if proc.name() == PROCNAME:
        proc.kill()

Is there a terminal command that can do this job easily?

Answer 1

Linux has command pkill to kill by name

pkill python

exact matching

pkill -e 'python service_host.py'

check in full name

pkill -f 'service_host.py'

More in man pkill

BTW: There is also pgrep to get PIDs using names.

Answer 2

You've tagged this with "python" and your script was close to doing the right thing, so here is a fixed version of your script -- use the cmdline method to extract the command line as a list:

import psutil

PROCNAME = "service_host.py"

for proc in psutil.process_iter():
    # check whether the process name matches
    cmdline = proc.cmdline()
    if len(cmdline) >= 2 and "python" in cmdline[0] and cmdline[1] == PROCNAME:
        # print(proc)
        proc.kill()

although various possibilities from the Linux command line are of course possible.

kill `ps -ef | grep "python service_host.py" | grep -v grep | awk '{print $2}'`

or whatever...

Answer 3

Using htop instead you'll be able to filter with F4 the processes service_host instead and have a look at the whole tree with F5 . From there you can kill them all at once with F9 ...

Follow these simple 3 steps:

1. enter htop
   • optionally press F4 and type service_host to filter the process to kill
   • optionally press F5 to sort processes as a tree. This organizes child processes to its primary process ID (PID)
2. scroll the list and highlight the process to kill , then press F9 for kill options
3. highlight 15 SIGTERM (signal terminate) to gracefully request to stop the proccess(es) or 9 SIGKILL (signal kill) to forcefully shut down the process(es) and finally press enter

I usually go with 9 SIGKILL without worrying too much, but it's up to you and what you're doing within your python script!