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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tl;dr: On Unix-like platforms, if you use git clone --recursive on an untrusted repo, it could achieve remote code execution. Update to a fixed version of Git and other software that embeds Git (including GitHub Desktop).
This paper reflects work done in late 2022 and 2023 to audit for vulnerabilities in terminal emulators, with a focus on open source software. The results of this work were 10 CVEs against terminal emulators that could result in Remote Code Execution (RCE), in addition various other bugs and hardening opportunities…
However recently it added a killer feature: generated columns . (This was added in 3.31.0, released 2020-01-22.)
As I've spoken and written about all modern terminals are actually "emulating" something dating from the 1970s.
Some places say 255 bytes. They are wrong . Within a TXT record there are multiple character-strings (RFC 1035 section 3.3.14 ) and those are limited in length (because a single byte is used for their length), however there can be many of them.
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.