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#!/bin/bash
echo "instream(10.20.213.11@40266):" | \
  sed -E 's/.*\b([0-9]+(\.[0-9]+){3})\b.*/\1/'
# => 10.20.213.11

Success #stdin #stdout 0.01s 5420KB

stdin

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Standard input is empty

stdout

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10.20.213.11

https://ideone.com/hDwvAx

language:

Bash (bash 5.0.3)

created:

visibility:

secret

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