I Can't Turn On my NSLU2

Today, I couldn't connect to my NSLU2 at home.  After I came back home and found that my device was off and couldn't turn it back on.  When I click on power button, the power button blinked once.  Oh no, did my NSLU2 hardware fail?????

[Source: http://commons.wikimedia.org/wiki/File:NSLU2_Front_resized.jpg]

What would I do?  Of course, I will Google it and the 9th result solves my problem.

It turns out the power adapter (DC Output: 5.0VDC 2.0A) is faulty.  And lucky I could find a (5V 2.4A) adapter to replace it.  (I'm not good at electricity stuff.  Hope the extra 0.4A wouldn't do any thing bad to my NSLU2).

Good that I only spend 2 hours to make it works again since it's my little home server.

Cache Ubuntu Update to Speed Up Update and Save Bandwidth

If you have several Ubuntu machines at home, every time there is a new package, you will need to download the same package several times.
Just found out a package called squid-deb-proxy.  You will need to have a server and install

sudo apt-get install squid-deb-proxy avahi-utils

and in other machines install:

sudo apt-get install squid-deb-proxy-client

From now on, "avahi" on the server will advertise the proxy server in your network.
And when you download any package from any of your local machines, it will see the proxy server and download the package through the server.

[via: http://castrojo.wordpress.com/2010/02/28/zeroconfing-squid-deb-proxy/]