Apart from the cross platform feed readers, you can try these ones on Linux:
Akregator is an open source news aggregator for KDE.
Snownews is a text mode RSS/RDF newsreader. It supports all versions of RSS natively and supports other formats via plugins. Runs on Linux, *BSD, OS X (Darwin), Solaris and probably many more Unices. Yes, even works under Cygwin.
Raggle is a console RSS aggregator, written in Ruby. Features include customizable keybindings, basic HTML rendering, HTTP proxy support, OPML import/export, themes, support for various versions of RSS, Screen support. browser auto-detection, and more. Raggle has been tested under Linux, FreeBSD, Mac OSX, and OpenBSD, and should work properly under other Unix variants as well.
Imendio Blam is an RSS aggregator for GNOME, written in C# using Mono, GTK# and RSS.NET.
Straw is a desktop news aggregator for the GNOME environment.
Liferea a fast, easy to use, easy to install news aggregator for GTK/GNOME.
TheYoke is an ultra-simple, polite RSS aggregrator designed for use on the UNIX command line.