See the opsmanual for information about what the Emergency Banner is and when it should be deployed.
bundle exec rake emergency_banner:deploy['{campaign_class}','{heading}','{short_description}','{link}','{link_text}']
Where
campaign_classis the type of banner. At the moment this is should be one of "notable-death", "national-emergency" or "local-emergency"headingis the <H1> titleshort_descriptionis the text that appears under the titlelinkis the more information link- 'link_text' is the anchor text for the more information link above. Defaults to "More information"
N.B. Don't add spaces between the parameters.
bundle exec rake emergency_banner:remove