Linux in a Windows World
Linux in a Windows World
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Linux’s unparalleled functionality and adaptability have made it the main alternative to Unix and Microsoft Windows operating systems. And with good reason. System administrators realize that this robust alternative can greatly improve their operating system’s reliability and save them money, too. Linux systems are even less vulnerable to attacks by computer viruses and worms. Not surprisingly, businesses, government agencies, schools, and a wealth of other institutions are all looking to Linux to replace the Windows desktop for these same benefits.Linux in a Windows World takes an in-depth look at exactly how Linux can be brought into an organization that’s currently based on Microsoft Windows systems. Featuring a litany of insider tips
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Linux in a Linux World (re-submit),
This book has well developed details on Linux client configuration for Linux only solutions with some small Windows tidbits thrown in. Given that the scope of this book should be “Linux in a Windows World”, I expected more material on connecting Linux to modern Windows infrastructure, especially Active Directory. What coverage that was offered on Windows, e.g. some chapters dedicated to SAMBA, was mostly focused on 10-year older Windows NT era of technologies. I will delve in to some topics to illustrate this.
In Kerberos (Chapter 9), more than 80% of the coverage is about Linux Kerberos solutions and client configuration. There is a measly 2 pages out of 30 on Windows client configuration. In one area (page 216), the author states that Kerberos to Kerberos cross-realm trust to Active Directory would beyond the scope of this book, but I seem to recall that this information took up roughly 5 pages of text in Kerberos, The Definitive Guide by Jason Garman. There is zero coverage on how to configure Linux to use Active Directory KDC, which is something done in about two pages from the same aforementioned book. I’m wondering where’s the “Windows World” involved in this as overall coverage is again for Linux to Linux.
For the topic of LDAP (Chapter 8), the coverage is again about configuring Linux clients to use OpenLDAP for authentication. Even within the scope of Linux-to-Linux the information was limited (there’s less than adequate coverage about how lack of caching can cause serious problems, or how to use things like SASL for Kerberized authentication of LDAP). There is no mention of using Active Directory LDAP in this chapter for Linux clients. There was some coverage of Windows client configuration through pGina. However, I would prefer to see Windows solutions as this is suppose to be about a “Windows World” book, but get Linux-to-Linux solutions and with pGina, a Windows-to-Linux solution.
On the topic of DNS and DHCP (Chapter 15), only Linux solutions are covered, so there is no information on using Linux with Windows DHCP and DNS backends. In the scope of Linux DHCP, the information is very limited, and there is no information on how to assign IP addresses based on computer names, which is a feature that even Windows DHCP doesn’t support. Windows clients spit out names with an appended “0″ character to the DHCP server, which could be use for further configuration of services. In the scope of Linux DNS, there is no information about features needed in BIND to make it interoperable with Windows Active Directory, or even Linux Kerberos solutions for that matter. One needs Dynamic DNS, support for SRV records, and in particular for Active Direcotry, one needs support for underscore characters “_”, which I heard is a compile time option for BIND9. Additionally, Microsoft has a proprietary WINS record for legacy support that is not supported by BIND. Both Microsoft certification publications and “DNS and BIND” by Albitz and Liu (O’Reilly) offer solution scenarios for this. None of this important essential information was presented, as the predominant focus appears to be Linux-to-Linux.
On the topic of NTP services (Chapter 15), the information is applicable for older Windows 9X/ME/NT systems that used a NetBIOS to locate a non-NTP service from Windows NT. In Windows XP/2003 that is so ancient history and Windows has full support for NTP client and services through the w32tm command. This is completely absent from from the presentation and details on this topic. Also surprising is no mention of why time sychronization is vital to either any Kerberos solutions, including Active Directory; any clients authentication to a Kerberos KDC should sychronize to the clock on that same server, or else users will not be able to log on if their clocks are more than 5 minutes off.
When covering mail technologies (Chapter 13), most of the documentation is an overview of mail technology and a exploration of Linux solutions with sendmail and postfix, which is very good presentation of those technologies. Microsoft Excahnge Server gets an honorable mention of less than 2 pages out of 51 pages. I would have appreciated more scenarios on how to integrate Exchange including for a variety of technologies, and would also have been interested in Windows clients that would hook into Linux solutions. There’s no mention that that modern versions of Exchange are dependent on Active Directory — something of a headache for Linux admins, but important consideration for planning the infrastructure. The Windows interoperability in this area like other chapters was quite lacking.
There are four chapters in Part II “Sharing Files and Printers” dedicated to SAMBA and related technologies like CUPS integration. The coverage here is predominantly focused on 10-year old Windows NT era technologies. One chapter is even dedicated to NetBIOS Network, something even…
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|Mr. Torvalds, meet Mr. Gates,
The desktop sure has changed in the past decade. Whereas Linux was once resolved to be an OS for pure hobbyists and those who wanted to “escape from Redmond”, it now sits side-by-side with Microsoft Windows in many corporations and homes. The goal therefore of the new O’Reilly book “Linux In A Windows World” is to show how to get the two operating systems on speaking terms with each other.
What is the most common thing people do on any OS? You got it — print! Yet, time and time again, we have seen that even the simplest thing such as printing a document can be a nightmare when you have two different operating systems competing for the same printer. This is just a small real-life example of the type of task you will find while reading this book. You will be taken through the steps to get your Linux system working happily with that Windows printer down in Accounting.
Throughout the book the author does an excellent job of tackling a common system administrator task, such as using Active Directory (Windows Domains) for authenticating users on the Linux boxes. Not only does he cover the most common ways of doing the task, but he also goes into detail about alternative methods and “extras” that your system might need depending on your environment.
What I really enjoyed most of all in this book is the author does not favor one OS over the other. When the task is appropriate, or easier, on either Windows or Linux, he outlines how to do it and make the other OS utilize that service or feature on the host OS. This is where many other books fall short, in that they try and convince you that everything must be done under one or OS versus the other instead of just laying out the map and letting the users see which is the best choice.
Overall, this is a great reference work for any system administrator facing the challenge of having a mixed Windows and Linux environment. Although it doesn’t cover all the possibilities that could exist, it will cover the most common tasks as well as hitting up on one of the most important — security. Well worth the price for the number of gray hairs you will save in accomplishing some of these tasks in your mixed environment.
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|A pertinent intro to using Linux in a heterogeneous environment,
Linux in a Windows World by Roderick Smith (O’Reilly) is an excellent aid for anyone trying to work in a heterogeneous environment. It is targeted at administrators who would like to add the flexibility, security and stability of Linux to existing Windows networks. While primarily focused on integrating Linux servers in the enterprise, to add functionality or replace Windows servers, Smith also addresses the addition of Linux workstations and thin clients to a Windows network.
The text begins with a brief discussion of the available options for leveraging Linux in a Windows-dominated environment and when and where such applications are appropriate and effective.
Smith walks you through Samba file and print sharing, authentication with LDAP, Kerberos, NT domains, followed by remote access methods, and a medley of additional server applications for mail, backups and network management. I found the format very accessible; simple and clear enough for those new to Linux, but with sufficient detail to get up-and-running with a basic configuration.
The tone was refreshingly objective. Windows and Linux options were presented in an even-handed way, absent was the Windows bashing that frequently enters Linux literature. I was somewhat disappointed that the book spent so much time on increasingly obsolete NT Domains and so little with Active Directory, but it is understandable as the proprietary nature of Windows necessitates a lag time in the development of interoperable open source technologies.
Overall I found Linux in a Windows World to be an excellent resource for mixed networks. I would consider it a must read for anyone thinking about adding Linux to their Windows network. It covers all the bases, giving the reader an overview of the available options before delving into the most common solutions. I personally found it useful in configuring several servers in my all-Linux network.
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