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8 of 8 people found the following review helpful:
4.0 out of 5 stars
Making system administration easy, January 3, 2004
Webmin is an open-source web application which puts a graphical user interface on the typically command line oriented tasks involved in administrating a Unix-based server. I personally have been using Webmin for many years already, although I initially acquired most of my administration knowledge by getting my hands dirty at the command line level. If administration is not your main job and you don't have all the administration tool syntax memorized or the time to wade through man pages, having a helpful interface like Webmin is a godsend. The book's author, Jamie Cameron, is also the main developer of Webmin. When you read the book you realize that he is first and foremost a command line administrative guru. However, he wanted to develop something to help novice admins get important jobs done quickly without getting bogged down in learning syntax. The book has a useful "Contents at a Glance" page at the start which is handy when you want to quickly look up a common administrative task. Then there is the main "Contents" section which contains all of the chapters' subtopics and titles. The end of the book contains a very thorough index. Although the book has 60 chapters, the author did not bother to explicitly divide them up into sections. On my first glance at the book, it seemed as though the chapters were not very logically ordered, but upon further inspection I realized that they follow the general ordering of the modules within the Webmin application. The one exception is that the chapter on configuring Webmin itself is found close to the end of the book although it is the very first module in the actual application. If I had to split the book up into sections, I would do so as follows: Introduction/Installation, System Modules, Networking Modules, Hardware Modules, Miscellaneous Modules, Server Modules, Usermin, Clusters, Webmin Configuration, Custom Module Development, and The API. The book starts off with a rather short but efficient introduction, installation guide and security suggestions for Webmin. Maybe a few more ideas should have been included in the "Securing Your Webmin Server" chapter. I'm sure security is a topic which many admins would like to see emphasized because of the general mistrust of granting power to a remotely accessible administration system which might easily allow a hacker or ignorant admin to take down a critical server. Webmin lets you perform many high-level tasks without ever knowing what files on the server are being affected. For myself, as a programmer who sometimes gets involved with administration work, I have configured sendmail services using Webmin many times and I have just let it work its magic without worrying about the file changes being made. This book, in addition to explaining usage of the application, fills in the details of what is going on behind the scenes. I believe Webmin is a great tool for junior administrators or hobbyists to learn Unix-based administration as long as a book like this one is used so the processes are thoroughly understood. This book probably won't be of much use to a professional administrator with lots of experience and a repertoire of scripts to handle all daily admin tasks. Although, if you are a pro and have grown weary of tedious command line work, this book will help you quickly get up to speed with the Webmin interface. I found that the book also introduced me to a few concepts I had only heard about but had not really bothered to delve into more, such as Usermin and Clustering. Usermin is basically a trimmed version of Webmin meant for use by the average user on a system. I can see this being used in cases where an administrator wants to give users enough power to control their own email and website settings without giving them shell access. The author devotes three chapters to clustering and explains its usefulness, management and configuration. At the end of the book you will find a number of useful chapters on creating your own Webmin modules, including explanations of standard module flow structuring, API function descriptions, and a sample dissection of the default theme structure. This section alone may be reason enough for some to purchase this book. The writing is fairly clear, although as I mentioned before, some of the unusual chapter ordering and missing section divisions are distracting. All in all, this book is a very thorough explanation of the Webmin administration interfaces as well as an introduction to the lower level work being done by the interface, and a short but informative section for those wanting to create their own modules.
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by Richard Petersen
by Kyle Dent
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