If you don't know which directory you are in when you start,
could be more reliable (~ being a shortcut for your home directory). Of course, you could always use
to check which directory you are actually in, when you star, and adjust the path accordingly.
Another tip, if you are more used to using something like Konqueror as a file manager (I imagine the equivalents under gnome, XFCE, ... do the same trick) is that if you double click into the .tar.gz file, Konqueror wil open up the archive 'transparently', and so you will be able to drill down to the README and INSTALL files and read the details without actually opening up the tar archive (and potentially leaving all sorts of miscellaneous little files scattered about the place, if you are really not that interested, once you have actually read the details).