Here is an easy way to start a program for a Raspberry Pi with a Graphical User Interface automatically on boot up.
We’re assuming you are using a recent distro like Raspbian Buster. The autostart folder under ~/.config is where the file goes. The command file format to start your program is:
[Desktop Entry]
Type=Application
Name=HelloWorld
Exec=/usr/bin/python ~/hello.py
Save this file in the autostart folder and call it hello.desktop. This will start a simple “HelloWorld” type program (hello.py) written in Python with a Tkinter GUI framework. It’s probably as simple as it can get.
If you need to run Python under lighttpd, there’s a good tutorial over here.
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