<Ctrl-q> # Sometimes you may find your terminal window appears "frozen". Try pressing Ctrl-q. If that fixes it, it's probably because you originally pressed Ctrl-s
@firstname.lastname@example.org once when I was young and knew (almost) nothing, I turned off a Sun 3 at the power socket because I didn't realise that this was why the console was frozen
@climagic how many times have I accidentally saved vim
Knowing that, it should become evident that the communication is paused in the incoming direction only. The remote end is still receiving characters typed at the terminal.
This can be tested e.g., by running cat (which should echo lines from #stdin to #stdout), sending ^S, then typing some lines and then sending ^Q. The typed lines (and their echo) will then appear on the terminal.
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