Learning the bash Shell
Author: Cameron Newham & Bill Rosenblatt
Publisher: O'Reilly & Associates
Reviewer: Danny Yee
Like the other books in O'Reilly's Learning series, Learning the bash Shell is aimed at novices but is also useful to experienced users. It begins with the basics, not assuming the user has any experience with other shells or even with Unix, and would make a decent introduction to shell programming. The coverage is, however, comprehensive, with later chapters covering the more obscure features of bash and the more complex aspects of shell programming.
Many of my friends think the idea of a whole book devoted to a shell is bizarre, but that is more of an objection to bash (which is a bit on the baroque side) than anything else, and I won't enter into the relative merits of different shells. If you are, say, a novice Linux user, then Learning the bash Shell contains more than you are likely to want or need at first: the brief summary in a more general book such as Running Linux will be enough to get you by. If you start to do any sort of serious shell programming, however, Learning the bash Shell would be a most useful volume. Whether those who are familiar with other shells find it worthwhile will largely depend on how comfortable they are with the bash manual entry.
Danny Yee received review a copy of the book mentioned from O'Reilly & Associates, but has no stake, financial or otherwise, in their success. He can be reached at email@example.com.
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.
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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