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It's interesting, but wasn't `ps aux --forest` just enough?

Platform is a BSD, with no fancy-pants "ps", I guess.

Given that one tag on the article is OpenBSD, i suspect that is correct.

tedu is talking about OpenBSD, which doesn't have GNU ps; but OpenBSD does have a pstree package (which should output something like http://s0.cyberciti.org/uploads/faq/2014/02/pstree-outputs.j...). Of course, that's less educational.

Or keep htop on hand, with tree view toggled on.

htop is Linux software, it doesn't work on OpenBSD.

Point taken. Seems there is some OSX and FreeBSD support effort going on in the github repo, but i am not versed enough in the BSD differences to say if that will help with OpenBSD support in any way.

It does work on FreeBSD.

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