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I don't know where to post this question because it's half a programming question and half a Linux question, so forgive me.

I'm working on a project using Beaglebone Black and I need to execute a very complex python script automatically after the boot, so I followed this tutorial:

(https://stackoverflow.com/questions/28854705/executing-a-script-on-startup-using-beaglebone-black)

which worked, but the script is executed in the / directory and not in the correct directory, which is /root/pyfingerprint/examples/, so when the program tries to execute things in the examples directory it can't find them.

I tried adding a complete path for every line of code which required it and it worked for some parts of the project but it's not enough for cv2 and other libraries.

I tried to solve the problem simply adding os.system("cd /root/pyfingerprint/examples/") at the beginning of the python script but when the program execute on boot it says that the current directory is still /

The program works perfectly when executed manually but not on boot time.

Is there a way to set the working directory of the service to automatically execute it in the right directory?

Emanuele Sabato
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  • You should cd in shell before execute main python script, not cd inside the python script. You should show us how you execute your main python script if you need further assist. – 林果皞 Jun 04 '20 at 17:41
  • I'm not an expert on creating services, I just need to edit my .sh script and that's it or I need to do some other operations after that? – Emanuele Sabato Jun 04 '20 at 17:44
  • You need to show us the code inside shell script(.sh) which run the python script(s). Is there any issue if you put cd /root/pyfingerprint/examples/; inside shell script before run the python script(s)? – 林果皞 Jun 04 '20 at 17:52
  • Or you may want to do this: https://unix.stackexchange.com/a/200657/64403 – 林果皞 Jun 04 '20 at 17:58
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    It worked! i added cd /root/pyfingerprint/examples/ before launching the script. Thanks for the help! – Emanuele Sabato Jun 04 '20 at 18:17
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    Note, os.system() has no effect as it creates a new process in which to do the operation. Instead use os.chdir('/....') – meuh Jun 04 '20 at 18:31

1 Answers1

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As suggested by Fruit the solution is to add cd [dir] in the .sh script to launch the program. in my case the script is:

#!/bin/bash
cd /root/pyfingerprint/examples/
python3 main.py
Emanuele Sabato
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