Category Archives: Technology

Flapjax – Functional Reactive Programming in Javascript

Posted on March 3, 2011 by yc

What if programming can be as simple as writing spreadsheet formulas? Now – there are some complex spreadsheets out there for sure, but the power of spreadsheet comes from that the values are self-updating, i.e. changing value in one cell … Continue reading →

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Setting Up SPF DNS Records

Posted on February 25, 2011 by yc

SPF (Sender Policy Framework) is an internet standard to address SPAM by ensuring that emails are sent by only the valid senders from valid servers, so spammers cannot send fake emails for your domain (unless they have compromised your server … Continue reading →

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Comment Spam Filter Via reCAPTCHA

Posted on February 23, 2011 by yc

Akismet, the built-in spam filter for WordPress, appears to suffer from some reputation problems, so we’ll avoid using akismet for now, and instead, we will use reCAPTCHA. The nice thing about reCAPTCHA is that it’s got descent strength, and people … Continue reading →

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Enable SSL in Apache

Posted on February 23, 2011 by yc

In ubuntu, apache’s config files lie in /etc/apache2, and it uses two sub directories to determine the list of available virtual hosts: /sites-available – holds the configuration files of the defined virtual hosts /sites-enabled – holds symlinks that link back … Continue reading →

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Determine which process binds to which port in Linux

Posted on February 23, 2011 by yc

lsof -i tcp:<port_number> http://www.terrencemiao.com/Webmail/msg00900.html

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