Letters to the Editor
As an owner of Red Hat/TriTeal CDE, I was interested in the CDE article in the January 1998 issue of Linux Journal. However, I'd like to add one thing to the article concerning the root dtlogin “problem”. This isn't actually a problem, per se, it's a “feature”. Refusing dtlogins by root was chosen intentionally for security reasons. However, this feature can be disabled, as I discovered when I asked Red Hat support about it. Here are the three things that they suggested could be done:
1: Add dt to the /etc/securetty file.2: Remove the /etc/securetty file.3: Remove the line in the /etc/pam.d/dtlogin file referencing secure tty.
I simply did number 1, and now I have a nice X root login.
—Matt Harrell firstname.lastname@example.org
For your information, there is an incorrect URL in your “Ricochet Modem” article by Randolph Bentson (January 1998)—www.metricom.net does not work. The correct address is http://www.metricom.com/.
—Thomas K. Pedersentpedersen@kraft.com
I am happy to see an issue devoted to parallel processing, but I am curious why you did not include information on the Linux SMP project which is at http://www.linux.org.uk/SMP/title.html? This project is directly related to parallel processing.
Also, will LJ make any future effort to make an archive CD-ROM of all the past issues? I hope so, that would be great.
—Steel Viper email@example.com
I wish we had room for everything about our focus but there are only so many pages in a magazine. I would like articles about SMP and the Stone Soupercomputer program mentioned above, but they will have to be in the future. As to your second question, an archive CD-ROM of 1994 and 1995 will be available in March —Editor
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.
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