First, download the Zen theme if you haven't already done so.
$ drush dl zen
This will now enable you to use the "drush zen" command.
$ drush zen "Oliver Davies" oliverdavies --description="A Zen sub-theme for oliverdavies.co.uk" --without-rtl
The parameters that I'm passing it are:
- The human-readable name of the theme.
- The machine-readable name of the theme.
- The description of the theme (optional).
- A flag telling Drush not to include any right-to-left elements within my sub-theme as these aren't needed (optional).
This will create a new theme in sites/all/themes/oliverdavies.
For further help, type
$ drush help zen to see the Drush help page for the zen