This line will replace the last octet of ipv4 adresses in a given file with a zero:
sed -i '' -e 's/\(\([0-9]\{1,3\}\.\)\{3\}\)[0-9]\{1,3\}/\10/g' <filename>
This line will replace the last octet of ipv4 adresses in a given file with a zero:
sed -i '' -e 's/\(\([0-9]\{1,3\}\.\)\{3\}\)[0-9]\{1,3\}/\10/g' <filename>