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unix v7是最后一个广泛发布的研究型UNIX版本

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A Tutorial Introduction to the \s-2UNIX\s+2 Text Editor
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Brian W. Kernighan
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Almost all text input on
the
.UX
operating system
is done with
the text-editor
.IT ed .
This memorandum is a tutorial guide
to help beginners get started
with text editing.
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Although it does not cover everything,
it does discuss enough for most users'
day-to-day needs.
This includes
printing, appending, changing, deleting, moving and inserting entire lines of text;
reading and writing files;
context searching and line addressing;
the substitute command;
the global commands;
and the use of special characters for advanced editing.
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