Letters to the Editor
I would like to commend you on such a fine publication. It is good to see a magazine published on a regular basis about Linux, that has such excellent content. I would just like to make a few comments.
My first comment is regarding a couple of letters to the Editor from the September issue (Issue 41). The two letters are “More Novice Articles” and “More Technical Articles”. I feel that LJ has a nice balance of both novice and advanced articles, which makes it useful for the beginner, the guru and everyone in between.
My second comment is about the article “Robocar: Unmanned Ground Robotics” by Kerry Kruempelstaedter (also Issue 41). I found this article very interesting, although I believe that many of the pictures were missing from the article. The first figure is Figure 5, and 1 through 4 are...nowhere in site.
And finally, I have a question regarding your article titled “Quota: Managing Your Disk Space” (and again, issue 41). Towards the end of the article January says that to give everybody on your system the same quota use edquota -p <prototype> *. If this gives everybody on your system the same quota. Wouldn't this cause some problems? It is fine that all users get the same quota, but what about root, bin, daemon and other such users?
Overall though, it was yet another excellent article.
—Philip Cox firstname.lastname@example.org
Yes, pictures were left out of the Robocar article. There was not room for all of them, and the ones in the magazine did not get renumbered.
It's true that you would not want to set root, etc. to the same quota as users. In the article, Mr. Rooijackers mentions setting soft and hard to 0 for those accounts that should not have a quota. In the quota HOWTO, it recommends turning quota on and off for various partitions. Thus, if all your users are on one partition, while root is on another, you can use the above command to set the quota for all users, while not setting it for root.
I don't know why you invented a non-existent paper to blame the Hewson anti-Linux article for in LJ #40 [From the Editor]. You get it right in the footnote (The Sunday Times), but there is no such paper as The London Times as in your heading. The Times, the paper some people think published the article, is a different newspaper from The Sunday Times.
Congratulations on the generally high standard of LJ.
—Keith Briggs, England email@example.com
Sorry about that—the reference to it I had said the London Times. The editor who checked the article later and added the footnote should also have changed the reference in the body of the article.
The article on Microstation for Linux, in the July issue was nicely done and well written. The only problem is in the section “Installed Base” where it states “The review kit states that there are over 200,000 users of Microstation...” I am sure they don't include academic versions in that number. If this is the case, then none of the 200,000 are running Linux. In addition, the academic version is all that is available for Linux and to get it you must prove you are a student or faculty member of a four-year-degree university.
The sad truth of the matter is that Bentley, and for that matter most other software companies, don't get enough requests for Linux ports of their product, to justify the production costs. To illustrate this point, here is a portion of an e-mail I received from Phil Chouinard, a Bentley Representative, on August 4, 1997.
... to date, a complete commercial port hasn't happened. About the only thing that is holding us back right now is a commitment from the business community. Note that we do not get involved or wrapped up in OS wars—there is no winner in such (in fact, we've heard the same arguments from MacOS loyalists, OS/2 followers, etc.) Since we have commercial products running on these OSes where others don't, and we have also committed to the Internet—recently licensing Java from Sun, convincing us to do a full -fledged port really won't convince the business community to go to Linux, but the opposite may be true.
The above, I fear, is typical of the software community as a whole. Linux is now at an awkward moment. If business will use Linux, software companies will write programs for it. If software companies will write programs for Linux, business will use Linux. Neither wants to be first. How do we get out of this catch 22?
—Dave Blond firstname.lastname@example.org
More information on Bentley Systems, Inc., publisher of MicroStation 95, can be obtained from their web site at http://www.bentley.com/academic/products/order.html.
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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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