Zack Spec is a user on mastodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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I've written 'toot', a very simple command-line utility to allow Mastodon posts to be sent from the command-line: https://www.npmjs.com/package/toot
@glynn_bird for a more featureful command line tool, see tootstream https://github.com/magicalraccoon/tootstream
@LogicalDash thanks! I'll check it out.