Multi-Booting the Nexus 7 Tablet
Getting Ubuntu Touch Running
Ubuntu Touch is something I've been watching closely, particularly because I spent a little time with an Ubuntu Touch-equipped Nexus 7 at the Southern California Linux Expo. The Ubuntu Touch developer builds can be a little finicky, although they've stabilized in recent weeks. The key to getting them going in MultiROM is to select the "Don't Share" radio button when adding the ROM (Figure 2). The Ubuntu Touch builds come in two parts. Add the smaller hardware-specific zip file first (on my Wi-Fi Nexus 7, it's quantal-preinstalled-armel+grouper.zip), but do not reboot—go back, list the ROM again, then push Flash Zip, and select the larger ROM file (quantal-preinstalled-phablet-armhf.zip). After that completes, you can reboot your tablet into Ubuntu Touch. Be advised, though, that Ubuntu Touch is under very heavy development, and sometimes the daily builds exhibit issues—and may not work at all. Your mileage may vary. If you do get Ubuntu Touch going, but it seems unresponsive to touch, try sliding from the left bezel toward the center. That'll bring up a Unity-style launcher, and things should work from there. It took me a few tries to figure this out. I thought my Ubuntu Touch installation was broken or that I had a bad build. It turns out, it's just a different operating paradigm.
Figure 4. Ubuntu Touch on the Nexus 7!
The Nexus 7 by itself is a great, low-cost, high-power tablet. However, thanks to its status as a reference device, there's a lot of alternate OSes out there for it. MultiROM lets you try them all without requiring you to wipe your device each time you want to try a new OS or ROM build. Check it out, but back up your data, and read the documentation thoroughly.
The programmer who wrote the MultiROM program has a great sense of humor, and he left a "Pong" easter egg in the software. From the main MultiROM boot screen, just touch the MultiROM logo, and you'll get a proper portrait-orientation port of Pong (say that three times fast!)
XDA-Developers MultiROM Install Thread: http://forum.xda-developers.com/showthread.php?t=2011403
Nexus 7 Factory ROM Images: https://developers.google.com/android/nexus/images
Android SDK Tools Download Page: http://developer.android.com/sdk/index.html
CyanogenMod Home Page: http://www.cyanogenmod.org
AKOP Home Page: http://aokp.co
Ubuntu Touch Installation: https://wiki.ubuntu.com/Touch/Install
Ubuntu Touch Download Page: http://cdimage.ubuntu.com/ubuntu-touch-preview/daily-preinstalled/current
Bill Childers is the Virtual Editor for Linux Journal. No one really knows what that means.
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