Date: Thu, 14 Jul 2005 23:03:16 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: hzs202@nyu.edu Cc: freebsd-questions@freebsd.org Subject: Re: Problem Piping iostat -c to awk! Message-ID: <20050715040316.GB98600@dan.emsphone.com> In-Reply-To: <42D730EB.6070905@gmail.com> References: <42D7236A.6010803@gmail.com> <20050715032319.GA98600@dan.emsphone.com> <42D730EB.6070905@gmail.com>
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In the last episode (Jul 14), Hakim Singhji said:
>
> | iostat -c 300 1 | awk '!/[a-zA-Z]|^$/ {print $1}'
>
> This doesn't seem to work for me... awk tells me:
>
> awk syntax error at source line 1
> ***
> /[a: Event not found.
>
> Not sure how to allow awk to delete two top rows of iostat... other that
> the grep option -v. Does not seem to be working in awk.
You're probably running csh or tcsh, which try and interpret the !
character even in quotes. It'll work in a script, but on the
commandline you'll need to change it to \! . Alternatively, you can
print only lines with leading spaces followed by a number with:
iostat -c 300 1 | gawk '/^ +[0-9]/ {print $1}'
--
Dan Nelson
dnelson@allantgroup.com
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