Yellow Dog Linux on the iMac
I don't have a printer hard-wired to the Macintosh. Since I have so many machines, I've opted to move my printers to a print server that hangs on the network. The printtool setup gives options for setting up the printers, and an option is included for a remote host. I have two printers, an NEC Silentwriter95 (PostScript) and an HP DeskJet 693C. PostScript and ACSII printing worked fine on both.
YDL comes with the standard set of Linux applications. For the office worker or student, you have Abiword and Gnumeric for your word processor/spreadsheet combination. Not as full-featured as some of the commercial applications, but certainly capable of creating and printing a basic document. I did get an error related to gnome-print when running Gnumeric, but after re-installing the gnome-print RPM, the problem went away. Both applications printed fine. The GIMP is included for manipulating graphics files, as well as Electric Eyes. A number of games are also included. One I found particularly entertaining is Xboing, a spin on the old “Breakout” game with some slick effects and sound (unfortunately, the sound was a bit distorted on the iMac).
MOL stands for Mac-On-Linux and it is a wonderful contribution to PPC Linux, authored by Samuel Rydh. It can be run as a window in X or in console mode using fbdev (the frame buffer), and it allows you to use your existing Mac OS partition and applications from within Linux. Sound doesn't work, but you can set up a networking interface to access files and the Internet from MOL. I've used MOL before on my CS1.1 installation, and it worked quite well. For whatever reason, MOL on CS1.2 starts up but never finishes the boot process. I get a number of messages referring to an unsupported resource in the console from which it is launched. Thinking it may be an issue with the 2.2.14 kernel I'm using, I uninstalled the stock MOL and grabbed my copy from the other partition. It also failed, but with a different error. Looks like this one needs a little work. Again, it's most likely due to my being unable to use YDL's kernel (see Figure 9).
YUP stands for Yellow Dog Update Tool. It takes the RPM concept to the next level, querying an external network of databases to download and upgrade your software packages on demand, including itself, when necessary. From what I read on the mailing lists, there were some initial problems with YUP and it went through several rapid revisions, but in concept, it sounds like a neat tool. If you run yup update, it will go out and find the newest versions of your software on the Internet and update things for you. I prefer to control when and what I update, but for inexperienced users, this could be a nice option.
Linux, and in particular Linux on PPC, has come a long way. Yellow Dog Linux Champion Server 1.2 is a very good package. I did hit a couple of rough spots that may have stumped a first-time user, but fortunately, I have the experience to work around them. Were it not for my non-standard SCSI card in the iMac, things may have gone much smoother. In the end I had a very usable Linux system, not unlike what I use on x86 boxes (see Figure 10). I have used LinuxPPC and had even more problems with it before I went to Yellow Dog; however, that may have changed with LinuxPPC's newest release. Many resources are available on the Net, including mailing lists from both distributions as well as the mailing list/web site that I help maintain: http://www.imaclinux.net/. If you've got a Mac and would like to give Linux a try, now is the time. With MOL, you can now have the best of both worlds! If you do decide to give Linux on PPC a try and get stuck, I'd be happy to help where I can; drop me a line.
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