Sorry, that was wrong what I wrote before.
bunzip2: command not found : seems clear enough, but just to be extra sure, try using the command bzip2 . On my system bunzip2 is a symbolic link pointing at bzip2 so it's possible all that's missing is that symbolic link. But I'm clutching at straws, it looks like you need to install bzip2. These instructions
work well for me. untar the source and cd into it with
tar xzf bzip2-1.0.2.tar.gz && cd bzip2-1.0.2
Then follow the commands on that page