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Today's Howtos:

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HowTos

There are a lot of reasons you might want to manually set your MAC address for your network card. I won’t ask you what your reason is.

To change this setting, we’ll need to edit the /etc/network/interfaces file. You can choose to use a different editor if you’d like.

Change your Network Card MAC Address on Ubuntu


Partition Image is a Linux/UNIX utility which saves partitions in many formats (see below) to an image file. The image file can be compressed in the GZIP/BZIP2 formats to save disk space, and split into multiple files to be copied on removable floppies (ZIP for example), … Partitions can be saved across the network since version 0.6.0.When using Partimage, the partitions must be unmounted.

Partimage is very useful in the following situations

First you can restore your linux partition if there is a problem (virus, file system errors, manipulation error) . When you have a problem, you just have to restore the partition, and after 10 minutes, you have the original partition. You can write the image to a CD-R if you don’t want the image to use hard-disk space.

This utility can be used to install many identical computers. For example, if you buy 50 PCs, with the same hardware, and you want to install the same linux systems on all 50 PCs, you will save a lot of time. Indeed, you just have to install on the first PC and create an image from it. For the 49 others, you can use the image file and Partition Image’s restore function.

Backup and Restore Linux Partitions Using Partimage


If you want to create a system that is similar to a different system you have already set up, it can be difficult to remember each and every package you had installed.This method works best when you are exporting to and importing from the same distribution and, specifically, the same releasefor example, exporting from Ubuntu Dapper to Ubuntu Dapper or ubuntu edgy to ubuntu edgy.

Ubuntu uses the APT package management system which handles installed packages and their dependencies. If we can get a list of currently installed packages you can very easily duplicate exactly what you have installed now on your new machine.

Clone Your Ubuntu installation


Creating an optimal flexible layout (OFL) for a Xen cluster is more difficult than setting up a standalone box with just one environment running on it. This is especially true if you’re planning to let inexperienced users play on the boxes with escalated privileges, or if you are building your cluster to cope with disparate uses on the VMs. Databases, Web servers, and compute boxes can be difficult to manage in their own separate systems, and they’re much more difficult to manage in a Xen cluster if the sys admin of each VM is unaware of the load others are putting upon the architecture. The admins may not have sight of the other VMs’ hardware usage patterns and could encounter difficulty investigating bottlenecks and stoppages inside their own VMs caused by contention on the hypervisor’s other VMs. What is gained by using Xen in terms of flexibility and efficient use of hardware could easily be lost to complexity if initial plans of usage are poorly developed or inadequately tested. Gibbins shows how to set up a self-managed Xen cluster.

Xen Master is Yum


More in Tux Machines

OSS Leftovers

  • Sunjun partners with Collabora to offer LibreOffice in the Cloud
  • Tackling the most important issue in a DevOps transformation
    You've been appointed the DevOps champion in your organisation: congratulations. So, what's the most important issue that you need to address?
  • PSBJ Innovator of the Year: Hacking cells at the Allen Institute
  • SUNY math professor makes the case for free and open educational resources
    The open educational resources (OER) movement has been gaining momentum over the past few years, as educators—from kindergarten classes to graduate schools—turn to free and open source educational content to counter the high cost of textbooks. Over the past year, the pace has accelerated. In 2017, OERs were a featured topic at the high-profile SXSW EDU Conference and Festival. Also last year, New York State generated a lot of excitement when it made an $8 million investment in developing OERs, with the goal of lowering the costs of college education in the state. David Usinski, a math and computer science professor and assistant chair of developmental education at the State University of New York's Erie Community College, is an advocate of OER content in the classroom. Before he joined SUNY Erie's staff in 2007, he spent a few years working for the Erie County public school system as a technology staff developer, training teachers how to infuse technology into the classroom.

Mozilla: Wireless Innovation for a Networked Society, New AirMozilla Audience Demo, Firefox Telemetry

  • Net Neutrality, NSF and Mozilla's WINS Challenge Winners, openSUSE Updates and More
    The National Science Foundation and Mozilla recently announced the first round of winners from their Wireless Innovation for a Networked Society (WINS) challenges—$2 million in prizes for "big ideas to connect the unconnected across the US". According to the press release, the winners "are building mesh networks, solar-powered Wi-Fi, and network infrastructure that fits inside a single backpack" and that the common denominator for all of them is "they're affordable, scalable, open-source and secure."
  • New AirMozilla Audience Demo
    The legacy AirMozilla platform will be decommissioned later this year. The reasons for the change are multiple; however, the urgency of the change is driven by deprecated support of both the complex back-end infrastructure by IT and the user interface by Firefox engineering teams in 2016. Additional reasons include a complex user workflow resulting in a poor user experience, no self-service model, poor usability metrics and a lack of integrated, required features.
  • Perplexing Graphs: The Case of the 0KB Virtual Memory Allocations
    Every Monday and Thursday around 3pm I check dev-telemetry-alerts to see if there have been any changes detected in the distribution of any of the 1500-or-so pieces of anonymous usage statistics we record in Firefox using Firefox Telemetry.

Games: All Walls Must Fall, Tales of Maj'Eyal

  • All Walls Must Fall, the quirky tech-noir tactics game, comes out of Early Access
    This isometric tactical RPG blends in sci-fi, a Cold War that never ended and lots of spirited action. It’s powered by Unreal Engine 4 and has good Linux support.
  • Non-Linux FOSS: Tales of Maj'Eyal
    I love gaming, but I have two main problems with being a gamer. First, I'm terrible at video games. Really. Second, I don't have the time to invest in order to increase my skills. So for me, a game that is easy to get started with while also providing an extensive gaming experience is key. It's also fairly rare. All the great games tend to have a horribly steep learning curve, and all the simple games seem to involve crushing candy. Thankfully, there are a few games like Tales of Maj'Eyal that are complex but with a really easy learning curve.

KDE and GNOME: KDE Discover, Okular, Librsvg, and Phone's UI Shell

  • This week in Discover, part 7
    The quest to make Discover the most-loved Linux app store continues at Warp 9 speed! You may laugh, but it’s happening! Mark my words, in a year Discover will be a beloved crown jewel of the KDE experience.
  • Okular gains some more JavaScript support
    With it we support recalculation of some fields based on others. An example that calculates sum, average, product, minimum and maximum of three numbers can be found in this youtube video.
  • Librsvg's continuous integration pipeline
    With the pre-built images, and caching of Rust artifacts, Jordan was able to reduce the time for the "test on every commit" builds from around 20 minutes, to little under 4 minutes in the current iteration. This will get even faster if the builds start using ccache and parallel builds from GNU make. Currently we have a problem in that tests are failing on 32-bit builds, and haven't had a chance to investigate the root cause. Hopefully we can add 32-bit jobs to the CI pipeline to catch this breakage as soon as possible.
  • Design report #3: designing the UI Shell, part 2
    Peter has been quite busy thinking about the most ergonomic mobile gestures and came up with a complete UI shell design. While the last design report was describing the design of the lock screen and the home screen, we will discuss here about navigating within the different features of the shell.