= 2009-05-07 =

 * [http://www.alexa.com/ Alexa] 是流量統計的網路服務，今天無意間玩了一下中心的流量統計，發現三個有趣的現象：
  * 其一：搜尋關鍵字 － Clonezilla, Clonezilla Live, 再生龍, drbl, co-life 進榜前十大[[BR]][[Image(clonezilla_search.jpg, width=400)]]
  * 其二：流量在12月、1月、4月出現高峰，都恰巧是 Clonezilla Live 釋出新版的時間點，關聯性頗高。
  * 其三：我架設的 sensor6.nchc.org.tw 佔中心 6% 的流量，應該是研考會"台灣看透透"的連結威力。[[BR]][[Image(clonezilla_netflow.jpg, width=400)]]

== Networking ==

 * [http://www.debian-administration.org/article/Where_art_thou_-_CDPR cdpr] is a nifty little command which speaks the Cisco Discovery Protocol, allowing you to learn interesting things from your network.
  * 蠻有趣的套件，還可以查出接在哪一個 swicth 上的哪個 port。
{{{
jazz@drbl:~$ sudo apt-get install cdpr
jazz@drbl:~$ sudo cdpr
cdpr - Cisco Discovery Protocol Reporter
Version 2.2.1
Copyright (c) 2002-2006 - MonkeyMental.com

1. eth0 (No description available)
2. eth1 (No description available)
3. eth2 (No description available)
4. any (Pseudo-device that captures on all interfaces)
5. lo (No description available)
Enter the interface number (1-5):1
Using Device: eth0
Waiting for CDP advertisement:
(default config is to transmit CDP packets every 60 seconds)
Device ID
  value:  ********.nchc.org.tw
Addresses
  value:  140.110.***.***
Port ID
  value:  GigabitEthernet0/48
}}}