how to change maintenance mode

we can run this commands fromo any saide (DB or APPS)

How to know the status of maintenance mode:=
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SQL> select fnd_profile.value(‘APPS_MAINTENANCE_MODE’) from dual;

How to enable maintenance mode:=
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SQL> @$AD_TOP/patch/115/sql/adsetmmd.sql ENABLE

How to disable maintenance mode:=
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SQL> @$AD_TOP/patch/115/sql/adsetmmd.sql DISABLE

or 

run adadmin