</source>You should notice an error message: ''''ipconfig command not found''''. That error occurs since that is command was an MS Windows command, and our current platform is Linux.<br><br>It is not usually a good idea to run system commands in Python, this makes your Python code less portable and makes it require a specific operating system or a system that has those commands available. Also, allowing python to execute commands on the operating system can be a '''security problem'''. For these reasons you should only use '''sub-process''' and '''system commands''' as a last resort and stick to Python code only.<br><br>As you may recall from lab2, you issued '''import sys''' to import special variables from the system. You can import a subprocess in order to run common non OS specific commands securely.<br><br>