One liner with grep to extract the IP addresses from a file.
grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}' /path/to/fileThe "-o" option prints only the matched parts.
One liner with perl:
perl -ne 'print if s/.*((\d{1,3}\.){3}\d{1,3}).*/\1/' /path/to/fileBookmark/Search this post with
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