New answers tagged troubleshooting
You could try running lsof with the PID but chances are the file was opened at run time by the application but then not kept open; lsof -p 15020 | grep app.js Alternatively you could strace the application and look through the output for the full path to the file; strace -p 15020
If you power down and restart and it comes up with a Linux login, rather than a boot menu, Windows is probably gone. If you can't login then there is not much you can do. A Linux live CD would let it boot, and see what is there, but if you don't know how to use it, you will need to get some help.
Top 50 recent answers are included