I'm working using LaTeX, since I compile the document in the terminal, it would be much easier for me to open it in pdf viewer directly from the terminal.
I'm using OS X 10.8.2 in Polish, so I'm not sure of the English name of the viewer I'm using, but it's the default one, I guess it's
Preview in English. But the command
preview <filename.pdf> results in
-bash: preview: command not found.