A certain writ 'X' is a court order issued by a judge at a petitioner’s request compelling someone to execute a duty that they are legally obligated to complete. This writ of command is issued by the Supreme Court or High Court when any government, court, corporation, or any public authority has to do a public duty but fails to do so. It can also be used to order a task to be completed, or in other cases, it may require an activity to be ceased. Identify 'X'.