Date: Tue, 9 Jul 2002 12:04:20 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: David Smithson <david@customfilmeffects.com> Cc: FreeBSD-Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: How do I repeat a command N times? Message-ID: <20020709170420.GD20718@dan.emsphone.com> In-Reply-To: <003101c22768$80ddb250$0801a8c0@customfilmeffects.com> References: <003101c22768$80ddb250$0801a8c0@customfilmeffects.com>
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In the last episode (Jul 09), David Smithson said:
> Hello friends. I want to repeat a command 607 times and stop. How do I
> accomplish this besides writing a script that's 607 lines long?
Lots of ways.
for i in `jot 607` ; do
mycommand
done
This gets unwieldy if you want to loop, say a million times, since the
jot command creates a string made up of all the numbers separated by
spaces. A bit more complicated, but scales better:
i=1
while [ $i -le 607 ] ; do
mycommand
i=$((i+1))
done
If you're using zsh, you can use
repeat 607 ; do
mycommand
done
, but it's not portable to all shells like the while loop.
--
Dan Nelson
dnelson@allantgroup.com
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