Installing Ethereal Q 3.1: I installed an Ethereal RPM; why did it install Tethereal but not Ethereal?
Older versions of the Red Hat RPMs for Ethereal put only the non-GUI components into the ethereal RPM, the fact that Ethereal is a GUI program nonwithstanding; newer versions make it a bit clearer by giving that RPM a name starting with ethereal-base. In those older versions, there’s a separate ethereal-gnome RPM that includes GUI components such as Ethereal itself, the fact that Ethereal doesn’t use GNOME nonwithstanding; newer versions make it a bit clearer by giving that RPM a name starting with ethereal-gtk+. Find the ethereal-gnome or ethereal-gtk+ RPM, and install that also.