I once wrote a network calculator in awk: https://gist.github.com/jaysoffian/e41ca479d70e60efe59fded93528ab1b https://gist.github.com/jaysoffian/e41ca479d70e60

I once wrote a network calculator in awk: https://gist.github.com/jaysoffian/e41ca479d70e60efe59fded93528ab1b https://gist.github.com/jaysoffian/e41ca479d70e60efe59fded93... Backstory: circa 2000, at an early cloud company that no longer exists, we used Solaris boxes and provisioned them using JumpStart. They booted to a minimal state (we called them "embros") using DHCP. Later, our datacenter ops folks would have to switch their networking from DHCP to static as part of moving them to another network where a DHCP server didn't exist. So I wrote them this menu driven program they could run on console to help with the static configuration. (There were no high-level languages on the box save for shell, sed and awk. Even then, I apparently I had to use /usr/xpg4/bin/awk.)