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snorfsneflin/ipv4_pattern_matching.txt

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Last active January 16, 2016 23:22
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Regex to match on only valid IPs including local and bcast
Raw
ipv4_pattern_matching.txt
grep -E -o '(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)' file.txt
# match addresses formatted as IP/bits - e.g. 192.168.0.1/24
ip addr sh eth0 | grep -E -o "([0-9]+.){3}[0-9]+/[0-9]+"
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