Archive for January, 2008

workaround for mac os x lost wifi connection

Wednesday, January 30th, 2008

Update from 10.4 to 10.5 introduced a pain. After sleep and wake up, Mac losts connection to the wireless network. To reconnect, I have to specify SID and the WEP key manually. I hate it.

As a temporary solution, I found how to re-connect from a command line, thanks to the blog article “airport – the Little Known Command Line Wireless Utility”. I’ve created the file and run it when required:

sudo airport -ASID --password='$WEP_key'

symbolic and hard links under win32

Friday, January 25th, 2008

To my surprise, symbolic and hard links are partially supported even by windows 2000. Here is a small summary:


printing djvu books under Linux

Thursday, January 24th, 2008

When I print books, I prefer to have two pages per sheet. With PostScript or PDF books it’s easy, I just use But for djvu format, the procedure is complicated.


subscribe to comments

Wednesday, January 16th, 2008

WordPress plugin “Subscribe to Comments 2.1” allows readers to receive notifications of new comments that are posted to an entry. I think it improves usability and encourages commenting.

decline and fall of the trackbacks; rise and resurrection of the trackbacks

Tuesday, January 15th, 2008

Trackbacks have built the blogosphere. The automatic backlinking was a great idea. The both parties — the original and the linking blogger — were making benefit out of a trackback link.

Unfortunately, the trackbacks are extremely vulnerable to spamming. Indeed, trackbacks must work without human intervention (by design). Automatic filters doesn’t work well for blogs. And adding manual force breaks the design of trackbacks.

Fortunately, there is a simple solution.