"The reason people go for an operating system like
Linux is the sum of its parts—its total usefulness. It is
stable, affordable, fast, and runs on all kinds of hardware. It is
also extremely flexible right out of the box, largely because of
its powerful command-line interface (CLI), or shell.
"This article puts two such tools—GNU Wget and
cURL—in the spotlight. You learn how to use these two tools
to send status updates to the social networking site Twitter
without the use of a Twitter desktop application, and how to follow
feeds from both Twitter and FriendFeed right from the command
line."