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'
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'