Getting Started - Premade VM

Instructions for downloading Metafuzz, installing, and getting started through the pre-made VM (catchconv, libraries, should already set up for you)

Send questions to Sushant Shankar (


0. Set up your environment. 


For a virtual machine approach on Windows, try VMWare Player:


1. Download the pre-made VM.


Download the zip file at and unzip the file to a folder.


Go into the folder you unzipped the zip file to, and double-click on the DebianEtch.vmw file. This should open up the pre-loaded VM onto your VM software. If you get the following screen (or some variation of it - this is on VMWare Fusion, for Mac's), click 'I moved it'. The VM should then boot up.



If you are asked to login, the username and password are 'user' and 'user'.


2. Pick a seed file and start running!


Open up a Terminal (Application menu on the top --> Accessories --> Terminal).


Run  'singlemachine <file>' . Try an MP3 file to start (a sample one can be found under /home/user/valgrind-catchconv/seedfiles). Here is a screenshot of running the sample file:



The script will automatically create a directory for the test run, then start Catchconv. Now new bugs found will be uploaded to , along with statistics on the progress of the test run.


You can also run Catchconv or zzuf directly by using the following commands:


     docatchconv <seed file> <command>

     dozzuf <seed file> <command>


For example

     dozzuf test.mp3 mplayer test.mp3


will run zzuf with the seed "test.mp3" on the command "mplayer test.mp3".


3. Looking at the test results


Statistics and failing test cases will show up on Here is a screenshot of the first few errors that Catchconv picked up on the test run I showed you above:



Here is what each of the columns mean: