Editing Boot Command
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2. Editing GRUB ConfigThen Edit Boot Command 
 Appending:init=/bin/bash At the End of the Line beginning with: linux And containing: quiet Like: linux ... quiet ... init=/bin/bash 
Contents
$schemamarkup = get_post_meta(get_the_ID(), 'schemamarkup', true); if(!empty($schemamarkup)) { echo $schemamarkup; }