 <p>The shell can't do that directly, since there will only be a single stream coming from the source program (the cat, in this case).</p> <p>You need a helper program, such as <a href="http://unixhelp.ed.ac.uk/CGI/man-cgi?tee" rel="nofollow noreferrer">tee</a>. Try this:</p> <pre><code>$ cat mysig | tee -a F* </code></pre>