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We’ve had the Arduino based on Atmel’s ATMEGA8 and ATMEGA168 ‘AVR’ microcontrollers for some time. More recently, the Raspberry Pi (ARM ARM1176JZF-S on a Broadcom SoC) has stormed onto the scene along with the Gertboard (PIC + A/D + D/A + buffering) add-on for “general purpose I/O”. Also, there is now the IOIO board (PIC24F): . . . → Read More: IOIO USB I/O After an early start, and a long delay, “CE” compliance testing done, bureaucracy overcome, and whatever follow-on production batch and random delivery queue… I have one Raspberry Pi arrived in the post today! Below are the inevitable pics of the arrival 🙂 To be fair to Farnell/Element14, they undoubtedly have worked hard along with . . . → Read More: A Raspberry Pi Gone Postal Here’s a surprising “gotcha” for the filesystem btrfs… You are very limited to the maximum number of hard links to a single file when the hard links and that one target file are all in the same directory. For hard links where the source and target are in different directories, the limit for btrfs is . . . → Read More: btrfs max number of hardlinks gotcha The Ultimate Boot CD (UBCD) is a good compendium of PC diagnostic and repair utilities. However for more recent PCs, a bootable USB memory stick version is much more convenient, especially for when there is no CD/DVD drive… Also, you can easily add your own utilities into the mix. The instructions in the “readme” on . . . → Read More: Installing the Ultimate Boot CD to USB Memory Stick Using “man ntpq” or “man 1 ntpq”, you get the ‘brief’ version as shown below of the ntpq man page from a Gentoo system. Contrast with the more widespread and more informative ‘long’ version example or the Gentoo man 8 ntpq example that include the tally codes and output descriptions… Much further explanation is given . . . → Read More: man ntpq (Gentoo brief version) |
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