ISBN:1565926099Amazon.com
The title of David N. Blank-Edelman's new book, Perl for System Administration, is strangely redundant and thankfully misleading. The soul and source of Perl's core competence is Unix system administration, and another O'Reilly tome on Perl tricks for managing backups would not have been welcome. But the subtitle Managing Multiplatform Environments with Perl communicates the essential task: how to administer heterogeneous Unix, Windows NT/2000, and Mac OS systems from the same Perl-based conceptual platform.
Blank-Edelman introduces this diversity of notation to motivate a far-reaching discussion of system internals, and shows how Perl is a natural choice for cross-platform administration. The Unix and Windows "slash" path separators--"/" and "", respectively--are like crossed swords, where the Mac OS uses the less- generally-known colon (":"). In lesser hands, this treatment still would have been about LAN backups, but Blank-Edelman's familiarity with network imperatives drives the synthesis.
As the topics move beyond file systems, user accounts, and process control, the tripartite division in the discussion breaks down. Treatments of TCP/IP and e-mail feature discussions of NIS, WINS, DNS, and nslookup. The chapters on directory services and SQL database management--while apparently digressive--are inserted tactically to enable elegant approaches to the more mundane administrative tasks of sending and receiving e-mail and managing log files to maximize their utility. Blank-Edelman's keen pragmatism shines in the chapter on security in which noticing intrusion earlier instead of later draws on many of the skills that are developed throughout the book. Notably, each chapter ends with a recapitulation of Perl modules that were referenced in the preceding text.
The eclectic tutorial appendices--an old revision-control system (RCS), the extensible markup language (XML), the database language (SQL), and two undermotivated and esoteric protocols (LDAP and SNMP)--are so brief as to function more as a Perl-free zone for shop talk than as valuable précis for their respective subjects.
Delightfully, this is one of Perl's and O'Reilly's best-written books. Blank-Edelman's wit buoys the argument without descending into the all-too-common parlance of sappy testimonials, hollow confessions, or the burdensome ornamentation of inside jokes and puns. --Peter Leopold/p>
Reviews From AMAZON.COM
Multiplatform SysAdmin Perl Tools
The biggest asset of this book is the author's expert knowledge of the three platforms (Unix, Windows NT/2000, Mac) and the in-depth coverage he gives to each. With almost every Perl sysadmin tool he covers, he outlines the OS-specific Perl modules necessary to make the tool work on any of the platforms. This book is truly unique in that regard.
The Art of System Administration...revealed!
I was surprised to find a disclaimer at the beginning of the book on the places where it might NOT be a good idea to use Perl. Typically people take an all-or-nothing approach to toolsets like Perl. This might save some work where a small ksh script works ok - it's not always necessary to build a Perl program.
The best part of the book is highlighting the art and craft of system administration, possibly better than most attempts at it that I've previously read. Even disregarding the excellent examples and specific code for same, this is good as another resource of the harried sysadmin. Somewhat less so for the Perl junkies, however.
The biggest downside to this book is the inclusion of NT-specific constructs and concepts. Most system administrators won't touch NT, and most network administrators maintaining NT server farms probably won't touch Perl. This may be a bias of mine, of course.