Just posting a quick fix to a problem I had with using 7z to extract an archive. I could list the contents of the archive, but any attempts to extract gave an “Unsupported Method” error. Dan Jacobson posted a solution to the debian bug tracking system, which is to install the package p7zip-rar.
In Ubuntu 9.04, I ran:
sudo apt-get install p7zip-rar
Now, I can extract the contents of my file with 7z as follows:
7z e TekSavvyAM.exe