This book provides a unique balance of “big picture” principles that transcend specific software packages and version numbers, and very clear procedures on securing some of those software packages. An all-inclusive resource for Linux users who wish to harden their systems, the book covers general security as well as key services such as DNS, the Apache Web server, mail, file transfer, and secure shell.

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Superior application performance is more crucial than ever—and in today’s complex production environments, it’s tougher to ensure, too. If you use Linux, you have extraordinary advantages: complete source code access, plus an exceptional array of optimization tools. But the tools are scattered across the Internet. Many are poorly documented. And few experts know how to use them together to solve real problems. Now, one of those experts has written the definitive Linux tuning primer for every professional: Optimizing Linux® Performance.

Renowned Linux benchmarking specialist Phillip Ezolt introduces each of today’s most important Linux optimization tools, showing how they fit into a proven methodology for perfecting overall application performance. Using realistic examples, Ezolt shows developers how to pinpoint exact lines of source code that are impacting performance. He teaches sysadmins and application developers how to rapidly drill down to specific bottlenecks, so they can implement solutions more quickly. (more…)

Linux, like all Unix variants, was built for networking above all. As a result, its networking features are flexible and reliable–and daunting to Linux newcomers who aren’t familiar enough with terms and concepts even to know what to look for in the documentation. Bryan Pfaffenberger does a service to people new to Linux networking with Linux Networking Clearly Explained, an assume-nothing guide to local area networks (LANs) and Internet connectivity under the open-source operating system. Pfaffenberger shows how to do everything–file sharing, printer sharing, inter-machine backups, and Internet connection sharing–that most home and office computer users want to do with their LANs. He explains how Linux fits into an environment of diverse equipment, showing how to make Linux machines talk to Mac OS units and Windows computers. (more…)

This book is an easy-to-read guide to using IPCop in a variety of different roles within the network. The book is written in a very friendly style that makes this complex topic easy and a joy to read. It first covers basic IPCop concepts, then moves to introduce basic IPCop configurations, before covering advanced uses of IPCop. This book is for both experienced and new IPCop users. IPCop is a powerful, open source, Linux based firewall distribution for primarily Small Office Or Home (SOHO) networks, although it can be used in larger networks. It provides most of the features that you would expect a modern firewall to have, and what is most important is that it sets this all up for you in a highly automated and simplified way. This book is an easy introduction to this popular application. After introducing and explaining the foundations of firewalling and networking and why they’re important, the book moves on to cover using IPCop, from installing it, through configuring it, to more advanced features, such as configuring IPCop to work as an IDS, VPN and using it for bandwidth management. While providing necessary theoretical background, the book takes a practical approach, presenting sample configurations for home users, small businesses, and large businesses. (more…)

This cookbook contains ready-to-use hacks to solve problems Vim users encounter daily, from personalizing Vim to optimizations that boost productivity. It does not cover basic use of the editor but focuses on making life easier for experienced Vim users. Vim is a highly configurable, open-source, multi-platform text editor that is included as standard in most Linux distributions. It can edit code in any language, has a scripting language that allows extensions to its functionality, and is editor of choice for many programmers. This book is up to date with the new features in Vim 7.0. Chapters cover: changing the appearance of the Vim editor; improved file and buffer navigation; using templates, auto-completion, folding, sessions, and registers; formatting text and code and using external formatting scripts; Vim scripts and scripting. Each recipe has a self-contained description of the task it covers, how to use it, the benefits of using it, and compatibility with earlier versions of Vim. (more…)

Ubuntu Linux is a state-of-the-art operating system, and you need a book that’s just as advanced. Along with being the most comprehensive reference to installing, configuring, and working with Ubuntu, A Practical Guide to Ubuntu Linux® also provides extensive server coverage you won’t find in any other Ubuntu book.

Best-selling author Mark Sobell begins by walking you through every feature and technique you need to know, from installing Ubuntu–using the DVD included with the book–to working with GNOME, Samba, exim4, Apache, DNS, NIS, firestarter, and iptables. Sobell’s exceptionally clear explanations demystify everything from system security to Windows file/printer sharing. (more…)

Squid is the most popular Web caching software in use today, and it works on a variety of platforms including Linux, FreeBSD, and Windows. Squid improves network performance by reducing the amount of bandwidth used when surfing the Web. It makes web pages load faster and can even reduce the load on your web server. By caching and reusing popular web content, Squid allows you to get by with smaller network connections. It also protects the host on your internal network by acting as a firewall and proxying your internal web traffic. You can use Squid to collect statistics about the traffic on your network, prevent users from visiting inappropriate web sites at work or school, ensure that only authorized users can surf the Internet, and enhance your privacy by filtering sensitive information from web requests. Companies, schools, libraries, and organizations that use web-caching proxies can look forward to a multitude of benefits. (more…)

This book puts you in charge of the most flexible and adaptable graphical interface in the computer industry. The X Window System underlies graphical desktops on Linux and Unix systems, and supports advanced features of modern graphics cards. This unique inside look at X gives you a lot of useful ways to harness the power of this system effectively.

This book puts you in charge of the most flexible and adaptable graphical interface in the computer industry. The X Window System underlies graphical desktops on Linux and Unix systems, and supports advanced features of modern graphics cards. More people use the X Window System than ever before, but there are few books about X in print. X Power Tools fills that hole with the most practical and up-to-date information available.

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For many users, working in the Unix environment means using vi, a full-screen text editor available on most Unix systems. Even those who know vi often make use of only a small number of its features. Learning the vi Editor is a complete guide to text editing with vi. Topics new to the sixth edition include multiscreen editing and coverage of four viclones: vim, elvis, nvi, and vile and their enhancements to vi, such as multi-window editing, GUI interfaces, extended regular expressions, and enhancements for programmers. A new appendix describes vi's place in the Unix and Internet cultures. Quickly learn the basics of editing, cursor movement, and global search and replacement. Then take advantage of the more subtle power of vi. Extend your editing skills by learning to use ex, a powerful line editor, from within vi. For easy reference, the sixth edition also includes a command summary at the end of each appropriate chapter. (more…)

The key to mastering any Unix system, especially Linux and Mac OS X, is a thorough knowledge of shell scripting. Scripting is a way to harness and customize the power of any Unix system, and it's an essential skill for any Unix users, including system administrators and professional OS X developers. But beneath this simple promise, lies a treacherous ocean of variations in Unix commands and standards. "bash Cookbook" teaches shell scripting the way Unix masters practice the craft. It presents a variety of recipes and tricks for all levels of shell programmers so that anyone can become a proficient user of the most common Unix shell - the bash shell - and cygwin or other popular Unix emulation packages. Packed full of useful scripts, along with examples that explain how to create better scripts, this new cookbook gives professionals and power users everything they need to automate routine tasks and enable them to truly manage their systems - rather than have their systems manage them.

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