Replacing an IP address with sed
Sometimes you need to swap an IP address out of a file. Maybe you are moving a server to a new host, updating a config, or just tired of grepping through logs to find the old address. Whatever the reason, sed makes it trivial. The trick is matching the dotted-decimal pattern. An IP address is four groups of numbers separated by dots, so the regex needs to capture that structure. Here is the one-liner: ...