You didn't tell us what distribution of Linux you are using (there are many that use rpm). If it's Fedora Core, for example, then you should rather use
Code:
yum install packagename
to install a program (package) called
packagename. That solves dependencies for you, downloads and installs them (given that the asked package is in the Fedora reposities);
rpm itself does calculate dependencies and report you if some are missing, but it doesn't search nor download nor automatically install them for you.
Every modern distribution usually has a package manager (like yum in the above example) that can search for, download and install asked packages and their dependencies with one command. In most cases there exists even a graphical front-end for the package manager, so the user does not necessarily need to use any console commands if s/he doesn't want to. On Fedora the package tool can be found in the menus, I just don't remember it's name (but I assume it's easily found). On Ubuntu, for example, the package manager is
apt (
apt-get is the command to use) and the graphical front-end is called
Synaptic or
Adept (latter on KDE). I assume Mandriva and others have this kind of tool as well; SuSE probably uses it's YaST to do the job.
So: find out what tool your system uses to manage packages and either use the textual interface (command) or locate a graphical front-end, usually found in the system menu, or if you don't know how to find it (using Google for example:
Fedora package manager), post here which distribution you are using and more precise examples can be given.
