Linux Journal Contents #40, August 1997
Linux Journal Issue #40/August 1997
Features
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Designing a Safe Network Using Firewalls
by Paul Wouters
It is by no means necessary to purchase specialized firewall hardware or even software. A Linux server—running on a $400 386 PC—provides as much protection as most commercial firewalls, with much greater flexibility and easier configuration.
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Tripping Up Intruders with Tripwire
by Kevin Fenzi
You can ensure the security of your Linux machine with this program.
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TCFS: Transparent Cryptographic File System
by Ermelindo Mauriello
Think of TCFS as an extended NFS. It acts just like NFS, but allows a user to protect files using encryption.
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Wrap A Security Blanket Around Your Computer
by Lee Brotzman
TCP_wrappers: a simple, elegant and effective means to safeguard your network services.
News & Articles
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Programming with XForms, Part 2: Writing an Application
by Thor Sigvaldason
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Security and Authentication with Digital Signatures
by Robb Shecter
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Interview with Sameer Parekh
by James T. Dennis
Reviews
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Product Review Berkshire PC Watchdog
by David Walker
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Product Review XVScan
by Michael Montoure
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Book Review The Java Series
by Kirk Petersen
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Book Review The Linux Database
by Sid Wentworth
WWWsmith
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A Web Crawler in Perl
by Mike Thomas
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At The Forge : Templates: Separating Programs from Design
by Reuven Lerner
Columns
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Letters to the Editor
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From the Editor
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Stop the Presses
Linux Trademark Dispute
by Phil Hughes
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New Products
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System Administration
SATAN: Analyzing Your Network
by Rob Havelt
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Kernel Korner
A Non-Technical Look Inside the EXT2 File System
by Randy Appleton
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Linux Gazette
Big Brother Monitoring System
by Paul M. Sittler
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Best of Technical Support
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Sponsored by AMD
Built-in forensics, incident response, and security with Red Hat Enterprise Linux 6
Every security policy provides guidance and requirements for ensuring adequate protection of information and data, as well as high-level technical and administrative security requirements for a system in a given environment. Traditionally, providing security for a system focuses on the confidentiality of the information on it. However, protecting the data integrity and system and data availability is just as important. For example, when processing United States intelligence information, there are three attributes that require protection: confidentiality, integrity, and availability.
Learn more about catching the bad guy in this free white paper.
Sponsored by DLT Solutions
| Designing Electronics with Linux | May 22, 2013 |
| Dynamic DNS—an Object Lesson in Problem Solving | May 21, 2013 |
| Using Salt Stack and Vagrant for Drupal Development | May 20, 2013 |
| Making Linux and Android Get Along (It's Not as Hard as It Sounds) | May 16, 2013 |
| Drupal Is a Framework: Why Everyone Needs to Understand This | May 15, 2013 |
| Home, My Backup Data Center | May 13, 2013 |
- Linux Systems Administrator
- Senior Perl Developer
- Technical Support Rep
- UX Designer
- New Products
- Web & UI Developer (JavaScript & j Query)
- Designing Electronics with Linux
- Making Linux and Android Get Along (It's Not as Hard as It Sounds)
- Dynamic DNS—an Object Lesson in Problem Solving
- Using Salt Stack and Vagrant for Drupal Development
Enter to Win an Adafruit Pi Cobbler Breakout Kit for Raspberry Pi

It's Raspberry Pi month at Linux Journal. Each week in May, Adafruit will be giving away a Pi-related prize to a lucky, randomly drawn LJ reader. Winners will be announced weekly.
Fill out the fields below to enter to win this week's prize-- a Pi Cobbler Breakout Kit for Raspberry Pi.
Congratulations to our winners so far:
- 5-8-13, Pi Starter Pack: Jack Davis
- 5-15-13, Pi Model B 512MB RAM: Patrick Dunn
- 5-21-13, Prototyping Pi Plate Kit: Philip Kirby
- Next winner announced on 5-27-13!
Featured Jobs
| Linux Systems Administrator | Houston and Austin, Texas | Host Gator |
| Senior Perl Developer | Austin, Texas | Host Gator |
| Technical Support Rep | Houston and Austin, Texas | Host Gator |
| UX Designer | Austin, Texas | Host Gator |
| Web & UI Developer (JavaScript & j Query) | Austin, Texas | Host Gator |
Free Webinar: Hadoop
How to Build an Optimal Hadoop Cluster to Store and Maintain Unlimited Amounts of Data Using Microservers
Realizing the promise of Apache® Hadoop® requires the effective deployment of compute, memory, storage and networking to achieve optimal results. With its flexibility and multitude of options, it is easy to over or under provision the server infrastructure, resulting in poor performance and high TCO. Join us for an in depth, technical discussion with industry experts from leading Hadoop and server companies who will provide insights into the key considerations for designing and deploying an optimal Hadoop cluster.
Some of key questions to be discussed are:
- What is the “typical” Hadoop cluster and what should be installed on the different machine types?
- Why should you consider the typical workload patterns when making your hardware decisions?
- Are all microservers created equal for Hadoop deployments?
- How do I plan for expansion if I require more compute, memory, storage or networking?




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