DB2 command and SQL used to check DB2 edition, Fix Pack level, bitness (32/64-bit of DB2), install date and directory, license type and CPU/memory limit information.

A regular expression example used to find hyperlink and add nofollow attribute to it.

The Vi command to do interactive search and replace.

Using Windows batch file to create an infinity loop for running on Windows 7.

Now you can see the official intro of Windows 8 made by Microsoft at both D9 Conference and 2011 Computex at Taiwan.

Where is IE9 cache folder that temporarily storing videos played on Facebook?

For those who wonder what clickjacking is, watch these YouTube videos that demo the attack.