import re
import random
import string
from subprocess import Popen
import subprocess
from threading import Thread
import os.path
import time
results = []
start_processes = 6 # количество одновременно выполняющихся процессов
def run_command(result_storage): # запуск ping
    while True:
        S = [3, 4]
        S = random.choice(S)  # number of characters in the string.
        ran = ''.join(random.choices(string.digits, k = S))
        #print(ran)
        cmd = str(
            subprocess.check_output(
                ['ping', '-c', f'{ran}', 'google.' + 'com'],
                text=True
            )
        )
        result_storage.append(cmd)
threads = [] # поддержание определенного количества одновременно запущенных процессов
for _ in range(start_processes):
    t = Thread(target=run_command, args=[results])
    t.start()
    threads.append(t)
for t in threads:
    t.join()

 ping: google.com: Temporary failure in name resolution
Exception in thread Thread-4 (run_command):
Traceback (most recent call last):
  File "/usr/lib/python3.10/threading.py", line 1016, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.10/threading.py", line 953, in run
    self._target(*self._args, **self._kwargs)
  File "/media/sf_soft/vsc/test2.py", line 21, in run_command
    subprocess.check_output(
  File "/usr/lib/python3.10/subprocess.py", line 421, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.10/subprocess.py", line 526, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command '['ping', '-c', '150', 'google.com']' returned non-zero exit status 2.