tput bel
while true; do tput bel; sleep 1; done
echo -e '\a'
afplay
ffplay
say beep
zenity --info --text "hello world"
ping -a
tput
tput help
tput bel, paplay, echo -e '\a', printf '\7'
osascript -e 'beep 1'
afplay, ping -a, say, ntfy.sh, bip (alias)
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