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  • zhegu 10:27 pm on June 24, 2012 Permalink | Reply
    Tags: boost   

    boost::lexical_cast Performance 

    The current link for the comparison between boost::lexical_cast and scanf, printf, std::stringstream can be found in:
    http://www.boost.org/doc/libs/1_49_0/doc/html/boost_lexical_cast/performance.html

     
  • zhegu 9:25 pm on June 16, 2012 Permalink | Reply
    Tags: , Yum   

    Yum lock problem 

    If you get an error like this in Fedora while trying to upgrade using yum:

    “Existing lock /var/run/yum.pid:XXX…”

    All you have to do is to remove the yum.pid file located under /var/run/. You will need root previllege to do that.

     
  • zhegu 5:01 am on April 27, 2012 Permalink | Reply  

    Configure to install quickstep 

    These two packages are third-party in quickstep: libtecla and tc-malloc.

    So I need to install ncurses-dev, bison and flex.

     
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  • zhegu 7:45 am on April 25, 2012 Permalink | Reply  

    Inner peace 

    20120425-024327.jpg

    Went to university of Wisconsin arboretum last Sunday. Enjoyed, immersed, cleansed, and altogether, in awe.

     
  • zhegu 5:52 pm on April 24, 2012 Permalink | Reply
    Tags: Chinese, ,   

    Install Chinese Fonts in Linux Debian 

    Here is the list of packages you need:

    • ttf-arphic-gbsn00lp (AR PL SungtiL GB) //Simplified Chinese
    • ttf-arphic-gkai00mp (AR PL KaitiM GB)  //Simplified Chinese
    • ttf-arphic-bsmi00lp (AR PL Mingti2L Big5)  //Traditional Chinese
    • ttf-arphic-bkai00mp (AR PL KaitiM Big5)    //Traditional Chinese

    To install these packages, run:

    apt-get install ttf-arphic-bkai00mp ttf-arphic-bsmi00lp ttf-arphic-gbsn00lp ttf-arphic-gbsn00lp

    (Source: http://isis.poly.edu/~qiming/chinese-debian-mini-howto.html#Installing_Fonts)

     
    • Nick 6:30 am on September 17, 2012 Permalink | Reply

      Note that these packages have different names in Wheezy:

      fonts-arphic-gbsn00lp
      fonts-arphic-gkai00mp
      etc

      These and other fonts are in a section called ‘Fonts’ in Wheezy.

  • zhegu 5:45 pm on April 24, 2012 Permalink | Reply
    Tags:   

    How to set default browser in Debian 

    You need to point the symlink /etc/alternatives/x-www-browser to /usr/bin/[your browser] or other path where your browser is installed. One easy way to do this is to execute the following command as root:

    update-alternatives --config x-www-browser
     
  • zhegu 5:22 pm on April 24, 2012 Permalink | Reply
    Tags:   

    How to add entries to sudoers 

    Edit the file /etc/sudoers. Note that the file is read-only (even for su). You only need to use :w! in vi to force-write.

    # /etc/sudoers

    1. This file MUST be edited with the ‘visudo’ command as root.
    2. See the man page for details on how to write a sudoers file.
    3. Defaults env_reset
    1. Host alias specification

    User_Alias MYADMINS = jdoe

    1. User alias specification
    1. Cmnd alias specification

    Cmnd_Alias SHUTDOWN = /sbin/shutdown, /sbin/reboot, /sbin/halt
    Cmnd_Alias PKGMGMT = /usr/bin/dpkg, /usr/bin/apt-get, /usr/bin/aptitude

    1. User privilege specification
    1. Users listed above (MYADMINS) can run package managers and reboot the system.

    MYADMINS ALL = PKGMGMT, SHUTDOWN

    1. Users in the group wheel can execute any command impersonating any user.

    #%wheel ALL= ALL

    #Default rule for root.
    root ALL=(ALL) ALL

    (Source: http://wiki.debian.org/sudo)

     
  • zhegu 5:16 pm on April 19, 2012 Permalink | Reply
    Tags: Big Data, Database   

    4 Fundamental Problems in “Big Data” 

    Source: http://datameer.com/blog/big-data-analytics-perspectives/how-datameer-solves-big-data-analytics-problems.html

    There are 4 fundamentally different problems in the world of “Big Data”.  First is collecting and storing data. The second is finding data when you need it. The third is turning that data into useful information. The fourth is differentiating what does and doesn’t need to be secure, and keeping it safe…”

    1. Collecting and storing data

    2. Finding data when you need it

    3. Turning that data into useful information

    4. Differentiating data that needs or does not need to be secure

     
  • zhegu 9:42 pm on November 8, 2011 Permalink | Reply  

    How about the correctness. 

    One thing that I learned today, though in a hard and embarrassing way, is that the first thing I ever need to do to my work before handing it to somebody else as a finished craft, is to ensure the correctness. Without it there will be absolutely no point of going forward. Gotta be responsibile of my own work. And another thing is never el stupid of asking stupid questions. We all have been that point and enjoying sticking in it is an art. Soon you will advance to the next level. Just gotta focus on what I do, and do it perfect. Period.

     
  • zhegu 5:47 am on November 1, 2011 Permalink | Reply  

    SVN Create Branch 

    $ svn copy http://svn.example.com/repos/calc/trunk \
               http://svn.example.com/repos/calc/branches/my-calc-branch \
          -m "Creating a private branch of /calc/trunk."
     
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