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2013 年 1 月 – unethost無限空間虛擬主機 技術分享部落格

如何透過shell script來做domain name的篩選

如果從cpanel WHM抓出所有主機的域名(domain name)時,往往會發現,子域名(sub domain) 和頂層域名(top level domain) 是混雜的。

這時候,可以用基本的sed來做篩選。做法如下:
在一個文字檔 list 裡放所有的域名,例如:

aa.bb.com
cc.net
1123.org
1aa.bbcd.com

下指令:
cat list | sed -e “/[^\.]*\.[^\.]*\.[^\.]*/d” | sort

即可抓出所有想要的top level domain。( 這個指令的功能就是把所有的sub domain刪去而已。)