On the Web - Creating Your Own Security
Although it may be tempting to blame faulty software, incomplete patches or inadequate monitoring when security is breached on the Internet, a network or a personal computer, we must remember the part we ourselves play in computer security.
Internet security is the focus of this month's issue; back in the April 2004 issue, we looked at application and intranet security. More articles discussing these and other aspects of security can be found on the Linux Journal Web site. For an overview of how Linux and open-source software are meeting the security requirements of government agencies, read “Open Source Innovation within the DoD” (www.linuxjournal.com/article/7644) and “GNU/Linux Clears Procurement Hurdles” (www.linuxjournal.com/article/7678). Both articles are part of Tom Adelstein's Web column, Linux in Government. Keeping track of government's standing on Linux and open source is important, especially considering the warning issued this past summer by one government agency—the United States Computer Emergency Readiness Team—“advising people to use a different Web browser”.
If you are looking to enhance security on your home or small office network, putting a firewall in place is a good start. But, you knew that and you probably already have one. How about something a little more interesting—something that could turn into a nice little DIY project? In “Building a Diskless 2.6 Firewall” (www.linuxjournal.com/article/7383), author Christian Herzog explains how you can salvage some minimal hardware, replace the hard drive with a CompactFlash (CF) card and employ BusyBox to build a machine with an “iptables firewall, SSH dæmon, DHCP server and DNS server”. Christian's tutorial walks you through choosing the right software, selecting the best filesystem for the CF card, compiling the 2.6 kernel, filling the filesystem and booting with GRUB.
We all know that one important component of computer security is being prepared and able to recover when something goes wrong, as it always does on some level. A large part of one's ability to recover depends on the quality of the data backups, yet backups don't always rank high on people's to-do list. In fact, Phil Moses, author of “Open-Source Backups Using Amanda” (www.linuxjournal.com/article/7422), notes, “Data probably is the most important element in computing, but in too many cases I see data backups overlooked or approached in such a carefree manner that I shiver.” To this end, Phil focuses his article on Amanda, explaining how its ability to take on multiple configurations and multiple backup tape devices, “while requiring a minimum amount of time and resources” makes it an ideal backup solution.
Finally, for something a little different, check out Marco Tabini's article “PHP as a General-Purpose Language” (www.linuxjournal.com/article/6627). Using a PHP-based news aggregator script as an example, Marco demonstrates how the command-line version of PHP can “perform complex shell operations, such as manipulating data files, reading and parsing remote XML documents and scheduling important tasks through cron.”
Have you found a better way to monitor the traffic coming in and going out of your network? Discover a new use for your old 386? Send me an article proposal at firstname.lastname@example.org.
Heather Mead is senior editor of Linux Journal.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.Register Now!
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- Non-Linux FOSS: Caffeine!
- Managing Linux Using Puppet
- Doing for User Space What We Did for Kernel Space
- Tech Tip: Really Simple HTTP Server with Python
- SuperTuxKart 0.9.2 Released
- Parsing an RSS News Feed with a Bash Script
- Rogue Wave Software's Zend Server
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide