I have enjoyed your guide to the Linux desktop series immensely, and I was delighted to see that you wrote about my favorite window manager, Window Maker. Of course, I wasn't too terribly happy with your lack of praise for my darling, but still, I don't want to start a holy/flame war. I merely wanted to inform you of one thing. —Robert Wade email@example.com
I'm glad you liked the series. There is one more coming, which should be out in the next couple of months, that does basic coverage of the remainder of the window managers out there. —Michael J. Hammel firstname.lastname@example.org
I know that exaggerating about how long one has been using Linux is a long-standing tradition for some people in the community, but it's getting a little out of hand.
In the June 2000 issue on page 98, the article claims that H. J. Lu discovered Linux in 1990. That's simply amazing, since Linus announced the project on July 3, 1991. (www.li.org/li/linuxhistory.shtml)
Perhaps Mr. Lu has the capability of seeing into the future? —Dave Whitinger email@example.com
I neglected to mention an important point in my article on syslogd in the July issue of Linux Journal: If you plan to use the network features of syslogd, it is very important that this port be behind a strong and properly configured firewall router. If not, the feature should not be used. The network syslogd interface is a great way to do remote denial of service attacks, and even some far more insidious attacks. The denial of service can be to both CPU and disk, since sending tons of spurious messages can make syslogd fill a disk drive. Moreover, such messages may be used to obscure other evil activities which you might lose in a flood of phony messages.
Even more frightening is the possibility that you are watching some log files with, say, poorly written Perl scripts that interpolate variables containing strings from syslog-generated log files. There are some clever Perl hacks where you can compose strings that will execute programs as the user running the script. Such strings could be embedded in fake messages sent to your syslog d<\#230;>mon.
The upshot of all this is that while collecting logs from multiple machines over a network is a very nice and useful feature, you must be sure to prevent machines outside your network from reaching this port.
This is an important point, and I hope you can find room for my letter! Thanks a lot!
Here is the corrected Listing 1 to include with my other comment.
Due to an accident of typesetting, the syslog.conf listing in the July 2000 issue was incorrect. The correct listing appears below.
—Michael A. Schwarz firstname.lastname@example.org
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.
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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