You have to change the file path to whatever you're using, so you probably downloaded the file into something like
/home/whateveruseryouare
so that's the location they mean when they say
/Path/To/VMware-server-1.0.4-56528.tar.gz
so you have to
cd
to the location you downloaded the VMware file, and then run
tar xfvz VMware-server-1.0.4-56528.tar.gz
and it should unzip
