Usage is available via the --help option. Additional information is available within the script.
The script has been tested on several hundred servers without issue. It requires Python 2.3 or above. If you are running Python 2.3 you should probably upgrade Python as that version is ancient. If that's not possible then you will need to download and install the subprocess module.
To install subprocess module in Python 2.3:
wget -O popen5.tgz http://cvs.lysator.liu.se/viewcvs/viewcvs.cgi/root.tar.gz?root=python-popen5 tar xvzf popen5.tgz cd python-popen5/popen5 python setup.py install
*If it complains about "make" command not being found then you likely need to install the python3-devel package and try again.