Why shouldn`t linux be covered ? It`s an OS that can run on both the A1 and the Peg.
Just a personal thing. I don't like it (I installed it on my PC back when the AmigaDE SDK was released). It's not Amiga-related, there is reams of Linux information and dedicated mags available elsewhere if you need it, and the space could be better used elsewhere.
If you want to extend the magazine to cover all OS's that can potentially run on Amiga/Peg hardware then you'd have a Linux68k/LinuxApus section, LinuxPPC section, Mac OSX section, Mac OS8/9 section, AmigaOS section, MorphOS section, AROS section, and then there's the dozen or so OS's in the process of being ported to Pegasos... Heck you can even run Windows if you want using VirtualPC or Bochs.
I would just prefer it if the mag kept to covering OS's that are actually Amiga-compatible (MOS, AOS, Aros...) as this is what I'm interested in (and I guess most others too) :-)