Proč crontab vždy restartovat skript v pythonu s novým PID [duplicitní]

Mám python3 script a rád bych, aby ji spustit automaticky po restartu. To začíná, ale začíná to vždy s novým PID, ověřil jsem si to s ps aux. Pokud spustím soubor přes terminál, je to jen běží v stejným PID.

Použil jsem @reboot /usr/bin/python3 /path/myFile.py v crontab

import sys

from cryptography import x509
sys.path.insert(0, "..")
import time


from opcua import ua, Server


if __name__ == "__main__":

    # setup our server
    server = Server()
    server.set_endpoint("opc.tcp://0.0.0.0:4842/freeopcua/server/")

    # setup our own namespace, not really necessary but should as spec
    uri = "http://examples.freeopcua.github.io"
    idx = server.register_namespace(uri)


    # get Objects node, this is where we should put our nodes
    objects = server.get_objects_node()

    # populating our address space
    myobj = objects.add_object(idx, "MyObject")
    startCali = myobj.add_variable(idx, "Start Calibration", True)
    brigthness = myobj.add_variable(idx, "Brightneess", 0.0)

    brigthness.set_writable()
    startCali.set_writable()    # Set MyVariable to be writable by clients
    oldstartCalivar = 0
    oldbrightnesss = 1.0
    
   
 

    # starting!
    server.start()
    
    try:
        count = 0
        while True:
            time.sleep(1)
            
            if brigthness.get_value () != oldbrightnesss:
                changeBrightness = "xrandr --output eDP-1 --brightness %f" % (brigthness.get_value()) 
            oldbrightnesss = brigthness.get_value()
                
                     
    finally:
        #close connection, remove subcsriptions, etc
        server.stop()