What this snippet does
$# is the argument count and >&2 sends the usage message to stderr.
Expected output
usage: ./deploy.sh <release>
Why practise typing this
Typing shell scripting code builds muscle memory for the symbols and indentation Linux uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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