This compact and practice-oriented text covers features of UNIX as an operating system and classifies the entire UNIX commands into 15 categories. Separate chapters are devoted to essential commands for: interacting with UNIX, handling files and directories, security, mail and remote communication, UNIX enhancement, and system administration under SCO UNIX followed by troubleshooting hints for super users.There is an exhaustive coverage for system administration of UNIX system, generally available under all versions and releases of UNIX, particularly from AT & T UNIX to system V release 3.0.The book is ideally suited for the undergraduate and diploma level students of computer science and computer application courses.

In order to thoroughly understand what makes Linux tick and why it works so well on a wide variety of systems, you need to delve deep into the heart of the kernel. The kernel handles all interactions between the CPU and the external world, and determines which programs will share processor time, in what order. It manages limited memory so well that hundreds of processes can share the system efficiently, and expertly organizes data transfers so that the CPU isn't kept waiting any longer than necessary for the relatively slow disks. The third edition of Understanding the Linux Kernel takes you on a guided tour of the most significant data structures, algorithms, and programming tricks used in the kernel. Probing beyond superficial features, the authors offer valuable insights to people who want to know how things really work inside their machine. Important Intel-specific features are discussed. Relevant segments of code are dissected line by line. But the book covers more than just the functioning of the code; it explains the theoretical underpinnings of why Linux does things the way it does. This edition of the book covers Version 2.6, which has seen significant changes to nearly every kernel subsystem, particularly in the areas of memory management and block devices. The book focuses on the following topics: Memory management, including file buffering, process swapping, and Direct memory Access (DMA) The Virtual Filesystem layer and the Second and Third Extended Filesystems Process creation and scheduling Signals, interrupts, and the essential interfaces to device drivers Timing Synchronization within the kernel Interprocess Communication (IPC) Program execution Understanding the Linux Kernel will acquaint you with all the inner workings of Linux, but it's more than just an academic exercise. You'll learn what conditions bring out Linux's best performance, and you'll see how it meets the challenge of providing good system response during process scheduling, file access, and memory management in a wide variety of environments. This book will help you make the most of your Linux system.

Understanding UNIX introduces the UNIX operating system, providing a basic understanding of its architecture and operating principles. Rather than attempting to explain all the uses of each command, the book concentrates on the most practical commands and options. It gives all the necessary information to set up, use, maintain, and optimize a UNIX system with a minimum of trouble.

An accessible, yet comprehensive text that clearly explains Unix programming and structuring by addressing the fundamentals of Unix and providing alternative solutions to problems in concrete terms.

Organized by tasks, this guide covers the standard UNIX commands, options, scripts, programming languages, and major variations found in UNIX and Linux systems.

Maintain a robust, mission-critical Oracle8i database. This book provides administrative solutions for the day-to-day DBA. You'll learn how to install the database for maximum efficiency, upgrades, patches, migrations, tune, and maintain its security. The book also explains in detail how to build and support a fully functioning Oracle database. This authoritative text contains up-to-date information available on Oracle's latest release and shows you how to: configure database architecture; install and set up with UNIX requirements; create the actual database with scripts; GUI management produc.

Expert Dan Frakes Toiled Endlessly with OS X So You Don't Have To... OS X expert and incurable Mac addict Dan Frakes delved into the deepest, darkest regions of Apple's newest operating system to uncover the best and most efficient ways to get things done. The result of his tireless efforts, Mac OS X Power Tools, takes you step-by-step through insightful and essential tips, shortcuts, and solutions. Filled with choice coverage on installation, the Finder, networking, security, Unix, software, and much more—Mac OS X Power Tools is certain to save you countless hours (and frustration) and turn you in to the OS X expert you've always dreamed of becoming. Coverage includes: Foiling Finder Frustration Setting Up Your Mac Sensationally Mastering Mac OS and Third-Party Software Installations Developing a Dynamic Dock Clobbering Classic Networking and Surfing Superiorly Connecting Conveniently and Running Remotely Fine-Tuning Firewalls and Strengthening System Security Utilizing UNIX See the author's website at www.macosxpowertools.com

What was once regarded as the purview of programmers and administrators is now making its way to users' desktops-most notably via Mac OS X-and users have begun to take note. When you're ready to get to the heart of it all-to the operating system at the core of the Internet, the intranet, and quite possibly your own desktop-there's no better way to start than by consulting with this handy Visual QuickStart Guide. The authors who made Unix comprehensible to the masses are back with Unix, 2nd Edition: Visual QuickStart Guide-completely updated to reflect all that's new in Unix. The book discusses how to run a home network server and use CUPS, Samba, http, and more. Through simple step-by-step instructions, numerous tips, and plenty of visual references, you'll learn everything you need to know to make sense of the flavors, commands, and technical jargon surrounding the Unix operating system. Printing in the Unix environment, managing your system, and more are all covered in the straightforward, approachable style that has become the hallmark of the Visual QuickStart series.

When Practical Unix Security was first published more than a decade ago, it became an instant classic. Crammed with information about host security, it saved many a Unix system administrator from disaster. The second edition added much-needed Internet security coverage and doubled the size of the original volume. The third edition is a comprehensive update of this very popular book - a companion for the Unix/Linux system administrator who needs to secure his or her organization's system, networks, and web presence in an increasingly hostile world.Focusing on the four most popular Unix variants today--Solaris, Mac OS X, Linux, and FreeBSD--this book contains new information on PAM (Pluggable Authentication Modules), LDAP, SMB/Samba, anti-theft technologies, embedded systems, wireless and laptop issues, forensics, intrusion detection, chroot jails, telephone scanners and firewalls, virtual and cryptographic filesystems, WebNFS, kernel security levels, outsourcing, legal issues, new Internet protocols and cryptographic algorithms, and much more.Practical Unix & Internet Security consists of six parts: Computer security basics: introduction to security problems and solutions, Unix history and lineage, and the importance of security policies as a basic element of system security. Security building blocks: fundamentals of Unix passwords, users, groups, the Unix filesystem, cryptography, physical security, and personnel security. Network security: a detailed look at modem and dialup security, TCP/IP, securing individual network services, Sun's RPC, various host and network authentication systems (e.g., NIS, NIS+, and Kerberos), NFS and other filesystems, and the importance of secure programming. Secure operations: keeping up to date in today's changing security world, backups, defending against attacks, performing integrity management, and auditing. Handling security incidents: discovering a break-in, dealing with programmed threats and denial of service attacks, and legal aspects of computer security. Appendixes: a comprehensive security checklist and a detailed bibliography of paper and electronic references for further reading and research. Packed with 1000 pages of helpful text, scripts, checklists, tips, and warnings, this third edition remains the definitive reference for Unix administrators and anyone who cares about protecting their systems and data from today's threats.

The Unix for Oracle DBAs Pocket Reference puts within easy reach the commands that Oracle database administrators need most when operating in a Unix environment. If you are an Oracle DBA moving to Unix from another environment such as Windows NT or IBM Mainframe, you know that these commands are far different from those covered in most beginning Unix books. To jump start your learning process, Don Burleson has gathered together in this succinct book the Unix commands he most often uses when managing Oracle databases. You'll be able to reach into your pocket for the answer when you need to know how to: Display all Unix components related to Oracle, identify the top CPU consumers on your server, and even kill processes when necessary Stack Unix commands into powerful scripts that can perform vital DBA functions Monitor Unix filesystems, and automatically manage your trace files, dump files, and archived redo log files Use essential server monitoring commands such as top, sar, and vmstat And there's much more between these covers. If you need to get up to speed with Oracle on Unix, and quickly, this book is for you.