Date: Mon, 21 Jun 1999 10:53:37 +0930 From: Greg Lehey <grog@lemis.com> To: Michael Wang <mwang@tech.cicg.ml.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: what is the command named "[" in /bin directory? Message-ID: <19990621105336.B6820@freebie.lemis.com> In-Reply-To: <199906210117.VAA04758@cicgload-fs1-p.tech.cicg.ml.com>; from Michael Wang on Sun, Jun 20, 1999 at 09:17:50PM -0400 References: <199906210117.VAA04758@cicgload-fs1-p.tech.cicg.ml.com>
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On Sunday, 20 June 1999 at 21:17:50 -0400, Michael Wang wrote:
> Dear FreeBSDers:
>
> What is the command named "[" in /bin as shown below?
It's a synonym for 'test':
$ls -li /bin/[ /bin/test
1435 -r-xr-xr-x 2 root wheel 48732 Jun 18 11:29 /bin/[
1435 -r-xr-xr-x 2 root wheel 48732 Jun 18 11:29 /bin/test
It's used for things like:
if [ -f /unix ]; then
echo "System V";
elif [ -f /kernel ]; then
echo BSD;
fi
Greg
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