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  1. #!/bin/bash
  2. #!/bin/bash
  3. echo '192.168.1.1 foobar' | grep -E '[0-9]{1,3}(\.[0-9]{1,3}){3}'
  4. echo '192.168.1.1 foobar' | grep '[0-9]\{1,3\}\(\.[0-9]\{1,3\}\)\{3\}' 
  5.  
Success #stdin #stdout 0s 19632KB
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Standard input is empty
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192.168.1.1 foobar
192.168.1.1 foobar
https://ideone.com/C5S458
language:
Bash (bash 5.0.3)
created:
6 years ago
visibility:
secret

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