The first time you run php artisan laravelcms, it will guide you to install the CMS.

If you run the command again, then it will show below promots:

$ php artisan laravelcms
****
**** Initialize Amila Laravel CMS ****
****
****
**** Seems the Laravel CMS already initialized ****
****
**** To Upgrade It   : php artisan laravelcms --action=upgrade
**** To Clear Cache  : php artisan laravelcms --action=clear
**** To Uninstall It : php artisan laravelcms --action=uninstall

And there are some options:

$ php artisan laravelcms --help
Description:
  Artisan commands for Laravel CMS

Usage:
  laravelcms [options]

Options:
  -a, --action[=ACTION]              initialize or install or uninstall [default: "initialize"]
  -p, --table_prefix[=TABLE_PREFIX]  Default table_prefix is cms_
  -l, --locale[=LOCALE]              Default locale is en
  -s, --silent[=SILENT]              Silent mode yes or no [default: "no"]
  -h, --help                         Display this help message