Linux is a tried-and-true, open-source operating system released in 1991 for computers, but its use has expanded to underpin systems for cars, phones, web servers and, more recently, networking gear.

I thought we'd gone native this month and were going to show how to work nets and fish like the penguins do. I had a double-fisted, sheep-shanked, overhand cinch loop to teach you, along with the ...