The goal of this talk is to show the source of information many tools use to display process information. I will go through the most interesting files in the /proc filesystem and show what information is there, along with standard tools for displaying this information. This comes in handy when you don't have permission to install extra tools or tools that do not exist yet. I will also show the most common use cases: restoring binaries deleted by accident or intentionally, restoring deleted log files, finding disk space leaks, debugging process limits and environment variables, and many more.

Aivars Kalvāns is a FinTech developer, software architect, and consultant. He spent more than 18 years at Tieto developing and architecting payment card software for acquiring and issuing, accounting and utility payments through mobile phones, ATMs, and POS terminals. At the moment he is a contractor for Ebury exploring the Foreign Exchange area of the FinTech landscape.