Date: Sun, 9 Aug 2020 20:40:43 -0400 From: Aryeh Friedman <aryeh.friedman@gmail.com> To: Ernie Luzar <luzar722@gmail.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: csh use of grep | tr commands Message-ID: <CAGBxaXk3HEWG-LjcfuqpJBdaMC5MSEr_zS32HS4gOpDjGV57WQ@mail.gmail.com> In-Reply-To: <5F30962B.5060005@gmail.com> References: <5F30962B.5060005@gmail.com>
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On Sun, Aug 9, 2020 at 8:35 PM Ernie Luzar <luzar722@gmail.com> wrote:
> Double quotes are giving me trouble.
>
> I have a file with a line in it like this
> ip4="10.111.098.2"
> I want to get just the ip address
>
> ip=`grep "ip4=" directory-path/file-name
>
> $ip ends up having ip4="10.111.098.2" in it
>
> ip=`echo -n "${ip}" | tr -d "ip4="
>
> $ip ends up having "10.111.098.2" in it
>
> Putting | tr """ " "` after the echo above gives error.
>
> How do I remove the " around the ip address?
>
tr -d '"'
for example:
Desktop@neomarx% cat foo
ip4="0.0.0.0"
somethingelse="fred"
Desktop@neomarx% cat foo | grep ip4 | cut -f2 -d'=' | tr -d '"'
0.0.0.0
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