bashでjqを使ってJSONの配列をループさせる ref: http://qiita.com/ryo0301/items/2ac9d11f355f1cf52ea5

file1.sh

#!/bin/bash

json=$(cat list.json)
len=$(echo $json | jq length)
for i in $( seq 0 $(($len - 1)) ); do
  row=$(echo $json | jq .[$i])
done

list.json

[
  {
    "key": "k1",
    "val": "v1"
  },
  {
    "key": "k2",
    "val": "v2"
  }
]