Most offices have internet access especially for managers and employees to read and compose e-mails with customers. Anyway, everything has their bad side so most employees will try to access other things consuming more traffics, e.g., music videos, video streaming, songs and many more. As a result, e-mail applications may slow down. Since most of them will also have proxy to save valuable bandwidth and a popular one is Squid, [SquidGuard][] is able to help controlling internet usage for unimportant purposes.

Most modern mathematics might have summation in some parts of equation. Implementing this kind of equations in Python is very easy and straightforward. Python already provides built-in functions to help us, e.g., sum() and map().

Even though Mplayer is able to play RMVB by binary codec, sometimes it may not work as expect due to something weird as follow.

mplayer: symbol lookup error: /share/apps/codecs/drvc.so: undefined symbol: pthread_mutexattr_init

Fortunately, it has a workaround for this issue.

I was assigned to find out how to install Subversion on CentOS. It is a good version control system right now, especially for development teams in any enterprises. Installing Subversion on CentOS is quite easy as follows.

I have a mission to rip a subtitle from a DVD. My laptop is Ubuntu Feisty Fawn and my favorite tool is mencoder. In fact, I have never done something relating to subtitles before. However, mencoder should be able to satisfy me as always.

I have used an all-in-one ADSL wireless router LevelOne WBR-3402A at my home for a few years. It serves me very good until last month. The router often hangs up during the night once a day and continuously increases. Last night, it hanged up and never come back again. Goodbye my friend!

Anyway, my life have to go on. My new target is a broadband wireless router Linksys WRT54GL which L means Linux. The firmware of this router is based on linux and it is opensource. I can do many things later on.