If the gem installed successfully, Asciidoctor's xref:cli:index.adoc[command line interface (CLI)] will be available on your PATH.
To confirm that Asciidoctor is available, execute:

 $ asciidoctor --version

You should see information about the Asciidoctor version and your Ruby environment printed in the terminal.

[.output,subs=attributes+]
....
Asciidoctor {release-version} [https://asciidoctor.org]
Runtime Environment ({ruby-description}) (lc:UTF-8 fs:UTF-8 in:- ex:UTF-8)
....