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Déjà vu: Ghostly CVEs in my terminal title
As I've spoken and written about all modern terminals are actually "emulating" something dating from the 1970s.
David Leadbeater
Port knocking is mostly a bad idea. But people keep wanting to do it, for some false sense of security. If you don't consider it a security control but a way to keep garbage out of your logs, it might be valid. Here's one way to do it with OpenBSD's pf. More..
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Can your terminal do emojis? How big?
Emojis are great. They're particularly useful to put in the output of scripts and get some eye catching output. At least provided they aren't overused, just like colour.