Need To pull the attribute information


I am trying to pull the values of only "Json" attribute which is shown in the picture can any one please help me to get the json attribute information only?

i am trying this command knife search node '.' - a json? -format=json >nodeinformation but i get error

Please help me ASAP i need those info


What is the exact error message?
If you check the search options you will see there is no -format .

Thank you the issue is resolved i have removed -format for the command