I've found this one helpful:
RHCE Red Hat Certified Engineer Linux Study Guide (Exam RH302) (Certification Press)
> -----Original Message-----
> From: centos-bounces@xxxxxxxxxx [mailto:centos-bounces@xxxxxxxxxx] On
> Behalf Of Les Mikesell
> Sent: Thursday, June 02, 2011 3:18 PM
> To: centos@xxxxxxxxxx
> Subject: Re: Good book on Linux Admin (Centos 5.5)
>
> On 6/2/2011 2:28 PM, Eero Volotinen wrote:
> >
> >>>> My Admin books are out of date, so I need a new one that contains
> >>>> info about the Linux as in Centos 5.5.
> >>>>
> >>>> I am a "Sunday user"; not one earning a living as an Admin.
> >>>> Recommendations welcomed....
> >>>
> >>> how about:
> >>>
> >>> The Definitive Guide to CentOS (Books for Professionals by
> >>> Professionals) from amazon
> >> <snip>
> >> Then there's the Real Thing:
> >> I'd rate these evenly, though some folks think more of the second:
> >> Essential Systems Administration, Ealeen Frisch, O'Reilly. You
> should
> >> especially read the second chapter, The Unix Way, which explains,
> clearly,
> >> the archetecture of *Nix, and how it works and hangs together (not
> the
> >> code, but the o/s)
> >> (There's also an O'Reilly Linux Systems Administration title)
> >
> > for basic or advanced use: the rute:
> >
> > http://linux.2038bug.com/rute-home.html
>
> The things I always look for and almost never find are
>
> (a) A split between tutorial (step-by-step for common uses) and
> reference sections (that have all the options). Once you've followed
> the
> tutorial you won't want to wade through that again to find the option
> to
> make an obscure change.
>
> (b) Explanations of the OS/shell/window manager/ concepts involved
> and how much of what you are learning applies in general and how much
> are specific to this distribution/version/program. For example, a lot
> of what happens on a command line is done by the shell and will be the
> same for everything you type under that shell (wildcard expansion, i/o
> redirection, etc.). Likewise a lot of what you do in a GUI will be
> window operations that work the same way no matter what is running in
> the window. A lot of things are common among all unix-like systems and
> when you learn new things it would be nice to know which ones are only
> specific to certain situations.
>
> --
> Les Mikesell
> lesmikesell@xxxxxxxxx
>
>
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