.

must appear alone on its own line. After processing a markup element, nl deletes it from the text stream.

lists the common options for nl..

. lists the commonly used data types.

describes each component.

lists some examples of different formats in action.

).

).

[me@linuxbox ˜]$ sort -k 1,1 -k  2n distros.txt | sed -f distros-tbl.sed | groff -t > ˜/Desktop/foo.ps

Figure 21-2. Viewing the finished table

Final Note

Given that text is so central to the character of Unix-like operating systems, it makes sense that there would be many tools that are used to manipulate and format text. As we have seen, there are! The simple formatting tools like fmt and pr will find many uses in scripts that produce short documents, while groff (and friends) can be used to write books. We may never write a technical paper using command-line tools (though many people do!), but it’s good to know that we could.

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