Launch script on Linux using Putty

[ihccab]

On Apr 2, 2:07 pm, "ihccab" <ihc... at gmail.com> wrote:
> On Apr 2, 1:51 pm, "Ulysse" <maxim... at gmail.com> wrote:
>
>
>
> > On Apr 2, 12:56 am, Michael Hoffman <cam.ac... at mh391.invalid> wrote:
>
> > > Ulysse wrote:
> > > > Hello,
>
> > > > I have a python script which runs all the time (using of library
> > > > threading). I would like this scipt to run on a remote linux Os using
> > > > Putty. The problem is, when I close Putty command line window running
> > > > on my Win PC, the python script stops to run too.
>
> > > > I tried to use cron tables instead. By setting the time and restart
> > > > cron process, but it's not practical.
>
> > > > Do you know the right way to do this ?
>
> > > There are a few ways to do this, in order of easiest to most involved:
>
> > > 1. The easiest is to run nohup on your script in the background:
>
> > > $ nohup myscript.py > output.txt 2> error.txt &
>
> > > Then you can disconnect but your script will keep running. Try man nohup
> > >   for more information.
>
> > > 2. Use GNU screen on your remote terminal, and detach the screen instead
> > > of logging off.
>
> > > 3. Set up your script to fork as a daemon. Google for ["python cookbook"
> > > fork daemon] to find a few recipes for this.
> > > --
> > > Michael Hoffman
>
> > Thanks a lot but in my situation :
>
> > 1. nohup seems not to be installed on my "reduced linux distribution".
> > It's a OpenWrt tunning on my WRT54GL Broadband router.
>
> > 2. I have looked for the way I can "detach the screen" with Putty but
> > I've not found (May be you can precise ?)
>
> > 3. The "fork daemon" script found onhttp://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731
> > seems to be as huge as my own script and little bit hard to undestand.
>
> > So maybe "detach the screen" ?
>
> > Thanks
>
> Try running the script with the ampersand (&) at the end.
>
> ./myscript.py &
>
> that will put it in the background and you can exit the Putty window.
>
> You can start the script at boot by adding it to rc.local using the
> full path to the script.
>
> /path/to/myscript.py &

To check that is is running in the background, do:
ps -ef | grep myscript.py

You will see the process table entry for your script with the PID and
other info.