Graphic Administration with Webmin
Can you benefit from Webmin? Who should use it? Jamie Cameron, Webmin's creator, said this program “may be better suited for less-experienced users who are unfamiliar with configuration file formats than for enterprise sysadmins who already have a detailed understanding of UNIX”. I fully agree with that opinion, although I'd add that even if you are quite familiar with configuration files and the like, you might welcome an easier (and sometimes quicker) way of doing things.
Webmin packs a quite impressive, always growing, number of functions, but it allows you to use only what you require, through clear menus and forms, and it detects possible errors before they can do any harm. You should at least consider it for its learning value, because you can examine configuration files before and after each change, and, thus, learn how something was (or should have been) done. You can't avoid learning about each function before diving in, but Webmin provides at least an easier road to becoming a more proficient sysadmin.
Usermin: a Tool for End Users
Usermin is a close relative of Webmin, designed to allow end users to manage several administrative functions on their own, such as changing passwords and user details, managing mail (though a standard e-mail client is a better solution) and more. Usermin is available by default when you install Webmin. You can access it by navigating to http://127.0.0.1:20000, where you'll see an interface very much like Webmin's, but with far fewer functions. In fact, you can configure which functions will appear with Webmin. Start that program, go to Webmin→Usermin Configuration→Available Modules, and select which modules should be available via Usermin. You don't need to log in to use Usermin; it will assume the rights of the current user.
Federico Kereki is an Uruguayan Systems Engineer, with more than 20 years' experience teaching at universities, doing development and consulting work, and writing articles and course material. He has been using Linux for many years, having installed it at several different companies. He is particularly interested in the better security and performance of Linux boxes.
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