How to use the Linux sed command: 
Few Unix commands are as famous as sed, grep, and awk. They get grouped together often, possibly because they have strange names and powerful tools for parsing text. They also share some syntactical and logical similarities. And while they’re all useful for parsing text, each has its specialties. This article examines the sed command, which is a stream editor.
read more: Opensource.com sethkenlon
Supporting Open Source.
Have you tried: Diving with Sharks?