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The History library provides a history expansion feature that is similar to the history expansion in Csh. The following text describes the sytax that you use to manipulate the history information.
History expansion takes place in two parts. The first is to determine which line from the previous history should be used during substitution. The second is to select portions of that line for inclusion into the current one. The line selected from the previous history is called the event, and the portions of that line that are acted upon are called words. The line is broken into words in the same fashion that the Bash shell does, so that several English (or Unix) words surrounded by quotes are considered as one word.
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