Similar to make, the rant commandline tool reads a file called Rantfile, which contains task definitions. Unlike make, however, an Rantfile is just a valid script written in the Ruby programming language. Since Ruby comes with many useful libraries and is portable across many different operating systems, it is easy to write portable Rantfiles.

dhcpoptinj is a simple utility for injecting DHCP options into DHCP packets. It is implemented using netfilter-queue and mangles packets, either by inserting new options or replacing existing options.