There are a lot of foam roller products for myofascial trigger point treatment out there, but I am too cheap to buy a piece of recycled plastic pressed into a cylindrical form for 20 EUR or higher. This is one of the easiest DIY projects possible, so make your own! Continue reading →
At the end of last year I went to a sports and health fair, where I wanted to have a closer look at the available natural running shoes, especially the ones from Vibram (FiveFingers) and Leguano. Both type of shoes were comfortable and seemed to be of good quality. However, with an above the 70 EUR price range, they are quite expensive for a shoe that aims to be like no shoe at all. In fact, they are more like a pair of high quality socks with a special thin rubber layer glued to the sole (whereas the Vibram FiveFingers also seem to have some supportive structure integrated, which is kind of a contradiction to the barefoot philosophy). Making a custom fitted version should not be that hard, so I decided to make my own.
I recently bought a Samsung SSD to replace my HDD in my Arch Linux notebook. It is a “Samsung SSD 840 EVO 2.5 Zoll SATA”. One of the first things I do when I get new hardware is to make sure the latest firmware is installed. Mine did not have the latest firmware update and – as it was to expect – Samsung SSD firmware updates under GNU/Linux are not (officially) supported. Samsung ships only Microsoft Windows software, called “Magician”, which can directly update the firmware or create a live USB-Stick to do the update. Additionally, they provide *.iso image files (one for Microsoft Windows systems and one for Apple computer, respectively) to update the firmware from a live CD. The *.iso image file intended for Microsoft Windows would also work under GNU/Linux, only that my notebook does not have a CD Drive anymore. Obvioulsy, the only option left was to create my own live USB-Stick under GNU/Linux – without using Microsoft Windows and that crappy Samsung “Magician” software. A simple “dd” comand to “burn” the *.iso file on an USB-Stick did not do the trick, as the Isolinux version Samsung uses is over 10 years (!) old.
This article shows how to update the firmware of a “Samsung SSD 840 EVO 2.5 Zoll SATA” under GNU/Linux using a bootable live USB-Stick.
There is a lot of confusion and wrong information in the internet about the Unified Extensible Firmware Interface (UEFI) and how to set it up correctly – especially under GNU/Linux. What makes things worse and also confused me a lot is that all vendors tend to implement this “standard” differently. So although UEFI is defined as a new industry standard replacing the BIOS, it can hardly be called “standard” at this time. Yet another problem of understanding UEFI is, that people seem to mix up words that have a special meaning.
My old notebook still uses the old BIOS-MBR setup, not capable of any UEFI fancy-ness. But it is dying, so I recently bought a new one. It is an “HP EliteBook 840 G1”. I used that opportunity to familiarize myself with UEFI and GNU/Linux.
This article explains two things (only taking GPT setups into account):
How is UEFI implemented in practice and set up with GNU/Linux?
Since USB-Sticks, that are fast and have a high capacity, are finally affordable, I decided to buy a new one. I usually install a GNU/Linux live CD (more precisely live USB) distribution on my USB-Sticks: either SystemRescueCd or Kali Linux (former Backtrack). The left over space is used for the classical purpose of an USB-Stick – data exchange. Todays USB-Sticks have enough capacity to easily fit several GNU/Linux live distributions on them, while still leaving enough space for other data. So my plan was to create a multiboot USB-Stick, that would boot my favourite GNU/Linux live distributions mentioned above. Unfortunately, searching the internet for implementing this did not give me any satisfactory results. There are a ton of guides that explain how to create an USB-Stick that boots GNU/Linux, but there are almost no multiboot solutions. The few howto’s about multiboot USB-Sticks are either about booting *.iso files (which only works with some GNU/Linux distributions) with GRUB 2 (which is designed for static boot setups anyway) or require further customized modifications of the GNU/Linux live distributions. I wanted a simpler solution that – once created – allows for easy updating of the installed GNU/Linux live distributions.
This guide will explain how to create a multiboot USB-Stick that can boot several GNU/Linux live dirstibutions via Syslinux chainloading. It will have several partitions (one for each OS and one for the main Syslinux bootloader) and a separate data partition, that can be formated independently in any way you like, so that your data is seperated from the operation system data. This guide installs SystemRescueCD and Kali Linux on your multiboot USB-Stick, but any other GNU/Linux live distribution should work as well. Adding more than two OS should also be no problem.
I recently build a little USB-SNES-Gamepad for my Android Tablet, because I didn’t like using the on screen controls of the emulators. It just wasn’t fun playing the games of my childhood without the original controller in my hands. Luckily my Tablet has a standard USB port with host capability and supports thumbdrives, keyboards and mice out-of-the-box. So I figuered I could easily put the controllerboard of a usb keyboard inside the spare original SNES gamepad i had liying around.