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  • 20 Jul 2010 /  FreeBSD, GNU/Linux, Unix

    HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for web sites crawling under very high loads while needing persistence or Layer7 processing.

    HAProxy is known to reliably run on the following OS/Platforms :

    * Linux 2.4 on x86, x86_64, Alpha, SPARC, MIPS, PARISC
    * Linux 2.6 on x86, x86_64, ARM (ixp425), PPC64
    * Solaris 8/9 on UltraSPARC 2 and 3
    * Solaris 10 on Opteron and UltraSPARC
    * FreeBSD 4.10 – 6.2 on x86
    * OpenBSD 3.1 to -current on i386, amd64, macppc, alpha, sparc64 and VAX (check the ports)

    Source:
    http://haproxy.1wt.eu

  • 15 Jul 2010 /  BASH, Programming

    Example:

    export IFS=$'\n'

    for i in $(find .);
    do
    echo LEXO$i
    done

    It work better for me under GNU/Linux Slackware, but is reported that under GNU/Linux Ubuntu it doesn’t work and the change for it is:

    Example:

    export IFS=$'
    ' # in the second line, generating the newline

    for i in $(find .);
    do
    echo LEXO$i
    done

    We can use hexadecimal too:

    IFS=$’\x20′ # Space
    IFS=$’\x09′ # Tab
    IFS=$’\x0A’ # Line Feed
    IFS=$’\x0D’ # Carriage Return

    Source:
    http://tldp.org/LDP/abs/html/internalvariables.html
    http://wikiri.upc.es/index.php/BASH_uso_IFS
    http://forum.soft32.com/linux2/Bug-409179-DASH-Settings-IFS-work-properly-ftopict70039.html

  • 09 Jul 2010 /  GNU/Linux, Hardware

    The goal of the CMUcam project is to provide simple vision capabilities to small embedded systems in the form of an intelligent sensor. The CMUcam3 extends upon this idea by providing a flexible and easy to use open source development environment that complements a low cost hardware platform. The CMUcam3 is an ARM7TDMI based fully programmable embedded computer vision sensor. The main processor is the NXP LPC2106 connected to an Omnivision CMOS camera sensor module. Custom C code can be developed for the CMUcam3 using a port of the GNU toolchain along with a set of open source libraries and example programs. Executables can be flashed onto the board using the serial port with no external downloading hardware required.

    Source:
    http://cmucam.org