csh use of grep | tr commands

[Christoph Kukulies]

file t:

ip4="1.2.3.4"


sed 's/\(ip4="\)\([^"]*\)\(".*$\)/\2/' <t


OTOH, tr -d '"‘ strips off double quotes.


Christoph



> Am 10.08.2020 um 02:34 schrieb Ernie Luzar <luzar722 at gmail.com>:
> 
> 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?
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