title: Linux command to print all jsons of same key
body: <p>I have json as a string "Str"</p>
  
  <pre><code>"{
    "A": {
      "id": 4
    },
    "B": {//Something},
    "C": {
      "A": {
        "id": 2
      }
    },
    "E": {
      "A": null
    },
    "F": {//Something}
  }"
  </code></pre>
  
  <p>I wanted all non null values of "A" which can be repeated anywhere in json. I wanted output like all contents of "A"</p>
  
  <pre><code>{"id": 4}
  {"id": 2}
  </code></pre>
  
  <p>Can you please help me with Linux command to get this ?</p>