Print this help message. See `drush help help` for more options.
drush help
command : A command name, or command alias.
--sort : Sort commands in alphabetical order. Drush waits for full bootstrap before printing any commands when this option is used.
List all commands.
drush
Show only commands defined in devel_generate.drush.inc
drush --filter=devel_generate
Show help for one command.
drush help pm-download
Show help for one command using an alias.
drush help dl
Show an HTML page detailing all available commands.
drush help --format=html
All available comamnds, in a machine parseable format.
drush help --format=json