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\section not not - negate the exit status of a job
\subsection not-synopsis Synopsis
<tt>not COMMAND [OPTIONS...]</tt>
\subsection not-description Description
\c not negates the exit status of another command. If the exit status
is zero, \c not returns 1. Otherwise, \c not returns 0.
\subsection not-example Example
The following code reports an error and exits if no file named spoon can be found.
<pre>
if not test -f spoon
echo There is no spoon
exit 1
end
</pre>
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