Extract particular string using Shell Script

Question

My text file contains data in the below format

{ "_id" : "abc" }
{ "_id" : "def" }
{ "_id" : "ghi" }
{ "_id" : "jkl" }

How can I extract the values from the above input and print it as below using shell commands

abc
def
ghi
jkl

Answer 1

With a proper json parser:

jq '._id' file.json