comp.sys.mac.advocacy - join
The Macintosh computer family compared to others.
High activity, 1224 subscribers, Usenet

comp.os.linux.misc - join
Linux-specific topics not covered by other groups.
High activity, 5247 subscribers, Usenet

comp.os.linux.setup - join
Linux installation and system administration.
Medium activity, 2206 subscribers, Usenet

comp.os.linux.security - join
Security and the GNU/Linux Operating System.
Low activity, 1796 subscribers, Usenet

comp.os.linux.networking - join
Networking and communications under Linux.
Medium activity, 3682 subscribers, Usenet

alt.os.linux - join
Use comp.os.linux.* instead.
Medium activity, 1146 subscribers, Usenet

comp.os.linux.hardware - join
Hardware compatibility with the Linux operating system.
Low activity, 1264 subscribers, Usenet

linux.kernel - join
linux-kernel@vger.kernel.org (Moderated)
High activity, 4342 subscribers, Usenet

comp.os.linux.announce - join
Announcements important to the Linux community. (Moderated)
Low activity, 598 subscribers, Usenet

comp.os.linux.development.apps - join
Writing Linux applications, porting to Linux.
Low activity, 1803 subscribers, Usenet