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From: Daniel <quite@hack.org>
Subject: command name '-'
Date: Sun, 8 Feb 2015 17:48:50 +0000 (UTC)
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I have in my ~/bin, which is in PATH, a command named simply '-' [minus]. I
can't seem to have this one executed. Typing - at the prompt and nothing
happens. Also, whence or type yiels exactly nothing. What gives?

I like to have + and - commands for changing volume easily in console, over
ssh, however...