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lang-bash
echomost certainly is a Bash builtin. In fact, it's a builtin in every major modern shell.which echo(with MacOS Ventura_13.4): Underzshreturnsecho: shell built-in command; Underbashreturns/bin/echo.type echo(with MacOS Ventura_13.4): Underzshreturnsecho is a shell builtin; Underbashreturnsecho is a shell builtin.