Regular Expression to Match IP Addresses Use the following regular expression to match IPv4 addresses (actually it matches all expressions from 0.0.0.0 to 999.999.999.999). #### Grep IP Addresses Parse a file and print all expressions that match a range between 0.0.0.0 and 999.999.999.999. #### This regular expression is quite simple but you should understand that not all matches are technically valid IP addresses. Let’s find only valid IP addresses with the second regular expression. Match […]