Date: Mon, 10 Aug 2020 15:56:51 +0100 From: Arthur Chance <freebsd@qeng-ho.org> To: Ernie Luzar <luzar722@gmail.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: csh use of grep | tr commands Message-ID: <adfce1c0-3b80-ad5c-cda6-eb919886c1b5@qeng-ho.org> In-Reply-To: <5F30962B.5060005@gmail.com> References: <5F30962B.5060005@gmail.com>
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On 10/08/2020 01:34, Ernie Luzar 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?
Provided you're using sh (or bash) for your script
eval $(grep -e '^ip4=' /path/name)
will set the variable ip4 to the address. Try echo $ip4 afterwards to see.
--
The number of people predicting the demise of Moore's Law doubles
every 18 months.
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