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I am wanting to grep for 192.168.22.xxx and 192.168.23.xxx. with a single grep statement where xxx can be any number.

I have tried

grep -Eo '192.168.2[2][3]\.[0-9]{1,3}'

and

grep -Eo '173.235.2[2][3][\.][0-9]{1,3}'

But this does not return anything. What is the correct regex I need to be using?

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Instead of [2][3] use [23]. Options should be included in the same [] group.

Also escape . every time:
grep -Eo '192\.168\.2[23]\.[0-9]{1,3}'

You can test it here

  • Ah! I was close lol. – user53029 Aug 23 '16 at 6:52

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