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\section or or - Conditionally execute a command
\subsection or-synopsis Synopsis
<tt>COMMAND1; or COMMAND2</tt>
\subsection or-description Description
The \c or builtin is used to execute a command if the current exit
status (as set by the last previous command) is not 0.
The or command does not change the current exit status.
\subsection or-example Example
The following code runs the \c make command to build a program, if the
build succceds, the program is installed. If either step fails,
<tt>make clean</tt> is run, which removes the files created by the
build process
<pre>
make; and make install; or make clean
</pre>
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