G'day mrkrinkle,

Welcome to the Monastery.

"perl -MCPAN -e ... (well MCPAN is what it's called now)?"

No, it's still called CPAN.

The -M option loads a module, what comes after is the name of the module to be loaded; so, that's -M followed by CPAN.

See perlrun for details of that and other options.