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Title:UNIX and Linux System Administration Handbook, Fourth Edtion
Description:Home page for the book UNIX and Linux System Administration Handbook by Nemeth, Snyder, Hein, and Whaley
Keywords:UNIX system administration, Linux system administration, Evi Nemeth, Trent R. Hein, Ben Whaley, Garth Snyder
UNIX and Linux System Administration Handbook, Fourth Edtion
Cover image and cartoons by Lisa Haney
ldquo;I recommend this book for anyone administering UNIX or Linux systems. rdquo;
David | 15 reviewers made a similar statement
ldquo;It's well written, easy to read and very informative. rdquo;
Gary L. Roach | 12 reviewers made a similar statement
ldquo;Best Linux book I have purchased ever to date. rdquo;
Josh | 15 reviewers made a similar statement
We are pleased to announce the completely updated twentieth anniversary
edition of UNIX and Linux System Administration Handbook! The book
is published by Prentice Hall and is currently in its sixth printing.
ldquo;As an author, editor, and publisher, I never paid much
attention to the competition mdash; except
in a few cases. This is one of those cases. UNIX System Administration Handbook
is one of the few books we ever measured ourselves against. rdquo;
mdash; from the Foreword
by Tim O'Reilly, founder of O'Reilly Media
ldquo;This is a comprehensive guide to the care and feeding of
UNIX and Linux systems. The authors present the facts along with seasoned advice and
real-world examples. Their perspective on the variations among systems is valuable
for anyone who runs a heterogeneous computing facility. rdquo;
mdash; Pat Parseghian
Find it online
Print and Kindle editions
Print and ePub (Nook) editions
Publisher's site; print andDRM-free PDF editions
Online access PDF chapters(subscription service)
Samples and extras
Sample chapters
Table of Contents
Foreword by Tim O'Reilly
Where to Start
Green IT
Past Forewords
LAH1E by Linus Torvalds
USAH2E by Allman and McKusick
USAH1E by Dennis Ritchie
Other resources
Errata and updates
Frequently asked questions
Obsolete chapters
Usenet News (USAH2E)
Disk Space Management (USAH2E)
Accounting (USAH2E)
Daemons (LAH2E)
About the book
In addition to comprehensive updates and the addition of scores of new topics, this
twentieth anniversary edition of the world's best-selling UNIX system administration
book has been enhanced with coverage of several leading Linux distributions: Ubuntu,
openSUSE, and Red Hat Enterprise Linux.
This book approaches system administration from a practical perspective and is an
invaluable reference for both new administrators and experienced professionals. It details
best practices for every facet of system administration, including storage management, network
design and administration, email, web hosting, scripting, software configuration management,
performance analysis, Windows interoperability, virtualization, DNS, security, management of
IT service organizations, and much more.
UNIX and Linux System Administration Handbook
covers the following operating systems:
Ubuntu reg; Linux
openSUSE reg; Linux
Red Hat reg; Enterprise Linux reg;
Oracle America reg; Solaris trade;
(formerly Sun Solaris)
HP HP-UX reg;
IBM AIX reg;
News, reviews, and media coverage
Saturday, December 17, 2011
TechSource Selects ULSAH4E as "Most Highly Recommended"
TechSource's Abhishek has named UNIX and Linux System Administration
Handbook a "most highly recommended" Linux book. You can see the complete
here, along with comments for each entry.
Monday, July 12, 2010 Interview
We were fortunate to have the opportunity to talk with Jonathan Corbet
of about our new edition and the state of UNIX and Linux generally.
It was an interesting discussion!
Thursday, May 10, 2007
Free Software Magazine Reviews Linux Administration Handbook, Second Edition
review of our previous, Linux-specific, edition describes our general approach to
the topic of system administration. Although there are several entirely new chapters
in ULSAH4E and several others that have been rewritten from scratch, the general flow
and structure remain similar to those of LAH2E.
Contact us
Errata for UNIX and Linux System Administration Handbook, 4E
We usually have the opportunity to make corrections before each printing.
Therefore, your book's complement of errors may vary depending on its printing.
To determine your printing, look at the last line of the copyright page.
Found a problem not listed here? Please let us know.
Your printing:
First printing
Second printing
Third printing
Fourth printing
Fifth printing
Updated pages
Page 33
The backquoted command wc -l /etc/passwd seen in the page's last command
line should actually be wc -l lt; /etc/passwd.
The issue is that wc -l prints out filenames as well as line counts when
filenames are supplied on the command line. Here, only the line count is wanted.
Page 44
Contrary to Table 2.2, bash has no string equivalents to the numeric -le
and -ge operators. The gt;= and lt;= operators listed
in Table 2.2 do not exist.
The gt; and lt; operators do exist. However, they must be
backslash-escaped or double bracketed to prevent them from being interpreted as I/O
redirection characters.
Page 45
The loop variable in the example for loop is actually called script.
The text refers to it as file.
Pages 51 and 52
The regular expression shown on pages 51 ndash;52 for matching various spellings of Moammar
Gadhafi's name is OK as originally printed. However, the accompanying text does not explain why
the ([dtz][dhz]?)+ group (a component of the last name match) allows repetition.
The + is there to accommodate variants such as Quadhdhafi. Really, that fragment
should be ([dtz][dhz]?){1,2} so that only one or two occurrences are permissible.
More generally, it's worth noting that this regex is permissive. Not every string that it matches
is a legitimate spelling of Gadhafi's name. However, it should match all legitimate spellings.
Page 153
The cross-reference in the last line of the first paragraph under The
setuid and setgid bits points to the wrong place.
The referenced material is on page 105, not page 106.
Page 466
The route commands at the bottom of the page are shell commands,
not excerpts from a startup script as the surrounding text might imply.
The # character indicates root's shell prompt, not the comment character
used in shell scripts.
Page 574
DNS Punycode names begin with xn--, not xf-- as stated in the text.
Page 808
In addition to having its own conventions, Debian's version of Exim
configuration uses the m4 preprocessor.
We don't describe the Debian system in this book.
Page 817
There are two errors on this page.
In the sentence "The sender's address is not checked because many user
agents get confused by error returns," replace "sender's address" with
"recipient's address."
The paragraph that starts "We next check the destination domain..." claims
that DKIM verification is not performed during this step. That is incorrect;
DKIM is in fact enabled.
Page 821
It is not entirely accurate to say that "If a message receives a
pass or decline from all the routers in the sequence,
it is bounced as an unroutable address."
In fact, Exim may either bounce or reject such messages, depending on the context.
Page 827
Contrary to the statement in the Debugging section, exim
does fork when given the -d flag. However, it does not detach itself
from the control terminal.
Page 852
In the configuration file excerpt, the line that sets
dkim_selector should do a lookup on $dkim_domain,
not $sender_address_domain as shown.
No formal errata are available for this printing yet.
We will update this list after the next printing has been finalized.

Frequently Asked Questions about ULSAH4E
I'm teaching a course that uses UNIX and Linux System Administration Handbook
as a textbook. Are there slides, outlines, or other materials available for instructors?
Unfortunately, no. This is something we'd like to do, but the scope of the book makes
it likely that different courses will choose to focus on different aspects of the material included
in the book. If you have specific suggestions for supplementary materials that you would find helpful,
please let us know.
Are solutions available for the end-of-chapter exercises?
No. Relatively few of the exercises have a single, clearly-correct answer. They're
designed to spark thought and discussion, so evaluating the quality of a particular answer is
inherently a bit subjective.
If you'd like to use the exercises in a classroom situation, our advice is to
prefer pragmatic responses that demonstrate a grasp of the key technical issues relevant to each question.
I'm interested in translating your book into another language.
Translation and foreign sales rights are handled by Prentice Hall. Please
contact us
and we will put you in touch with the right people.
Is your book available as an eBook? What formats are available?
ULSAH4E is available as a printed book, a Kindle book, a Nook-compatible ePub book, a DRM-free
PDF file, and as an online resource through Safari Books Online.
Please see the links on the home page.
Hey! I found a mistake! You suck!
We usually have the opportunity to make corrections
before each printing. Please send
us a note describing the issue and we will make sure it is addressed. (And thanks for your help!)
There's a problem with my printed copy of the book.
A small number of books were sent into distribution with missing pages or with pages out of order. If you've
ended up with one of these copies, please let
us know and we will hook you up with a replacement.

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