Por ejemplo, tenemos un archivo JSON:

http://dummy.restapiexample.com/api/v1/employees

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{
"status":"success",
"data":[
{
"id":"1",
"employee_name":"Tiger Nixon",
"employee_salary":"320800",
"employee_age":"61",
"profile_image":""
},
{
"id":"2",
"employee_name":"Garrett Winters",
"employee_salary":"170750",
"employee_age":"63",
"profile_image":""
},
{
"id":"3",
"employee_name":"Ashton Cox",
"employee_salary":"86000",
"employee_age":"66",
"profile_image":""
},
{
"id":"4",
"employee_name":"Cedric Kelly",
"employee_salary":"433060",
"employee_age":"22",
"profile_image":""
},
{
"id":"5",
"employee_name":"Airi Satou",
"employee_salary":"162700",
"employee_age":"33",
"profile_image":""
},
{
"id":"6",
"employee_name":"Brielle Williamson",
"employee_salary":"372000",
"employee_age":"61",
"profile_image":""
},
{
"id":"7",
"employee_name":"Herrod Chandler",
"employee_salary":"137500",
"employee_age":"59",
"profile_image":""
},
{
"id":"8",
"employee_name":"Rhona Davidson",
"employee_salary":"327900",
"employee_age":"55",
"profile_image":""
},
{
"id":"9",
"employee_name":"Colleen Hurst",
"employee_salary":"205500",
"employee_age":"39",
"profile_image":""
},
{
"id":"10",
"employee_name":"Sonya Frost",
"employee_salary":"103600",
"employee_age":"23",
"profile_image":""
},
{
"id":"11",
"employee_name":"Jena Gaines",
"employee_salary":"90560",
"employee_age":"30",
"profile_image":""
},
{
"id":"12",
"employee_name":"Quinn Flynn",
"employee_salary":"342000",
"employee_age":"22",
"profile_image":""
},
{
"id":"13",
"employee_name":"Charde Marshall",
"employee_salary":"470600",
"employee_age":"36",
"profile_image":""
},
{
"id":"14",
"employee_name":"Haley Kennedy",
"employee_salary":"313500",
"employee_age":"43",
"profile_image":""
},
{
"id":"15",
"employee_name":"Tatyana Fitzpatrick",
"employee_salary":"385750",
"employee_age":"19",
"profile_image":""
},
{
"id":"16",
"employee_name":"Michael Silva",
"employee_salary":"198500",
"employee_age":"66",
"profile_image":""
},
{
"id":"17",
"employee_name":"Paul Byrd",
"employee_salary":"725000",
"employee_age":"64",
"profile_image":""
},
{
"id":"18",
"employee_name":"Gloria Little",
"employee_salary":"237500",
"employee_age":"59",
"profile_image":""
},
{
"id":"19",
"employee_name":"Bradley Greer",
"employee_salary":"132000",
"employee_age":"41",
"profile_image":""
},
{
"id":"20",
"employee_name":"Dai Rios",
"employee_salary":"217500",
"employee_age":"35",
"profile_image":""
},
{
"id":"21",
"employee_name":"Jenette Caldwell",
"employee_salary":"345000",
"employee_age":"30",
"profile_image":""
},
{
"id":"22",
"employee_name":"Yuri Berry",
"employee_salary":"675000",
"employee_age":"40",
"profile_image":""
},
{
"id":"23",
"employee_name":"Caesar Vance",
"employee_salary":"106450",
"employee_age":"21",
"profile_image":""
},
{
"id":"24",
"employee_name":"Doris Wilder",
"employee_salary":"85600",
"employee_age":"23",
"profile_image":""
}
]
}

Guardamos en: http://jsonstore.top/?13tfpim0

jq es un procesador JSON de línea de comandos ligero y flexible.

Página de inicio: https://stedolan.github.io/jq/

jqes como sed de datos JSON - se puede utilizar para cortar y filtro y el mapa y transformar los datos estructurados con la misma facilidad que sed, awk, grepy los amigos que pueda tocar con el texto.

Instalar jq en CentOS

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yum install jq -y

Resultado:

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[root@tutorialspots ~]# yum install jq -y
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
epel/x86_64/metalink                                     |  32 kB     00:00
 * base: mirror.alpix.eu
 * epel: mirror.imt-systems.com
 * extras: linux.darkpenguin.net
 * updates: linux.darkpenguin.net
base                                                     | 3.6 kB     00:00
extras                                                   | 2.9 kB     00:00
ius                                                      | 1.3 kB     00:00
nodesource                                               | 2.5 kB     00:00
updates                                                  | 2.9 kB     00:00
Resolving Dependencies
--> Running transaction check
---> Package jq.x86_64 0:1.6-2.el7 will be installed
--> Finished Dependency Resolution
 
 
Dependencies Resolved
 
================================================================================
 Package        Arch               Version               Repository        Size
================================================================================
Installing:
 jq             x86_64             1.6-2.el7             epel             167 k
 
Transaction Summary
================================================================================
Install  1 Package
 
Total download size: 167 k
Installed size: 381 k
Downloading packages:
jq-1.6-2.el7.x86_64.rpm                                    | 167 kB   00:15
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : jq-1.6-2.el7.x86_64                                          1/1
  Verifying  : jq-1.6-2.el7.x86_64                                          1/1
 
Installed:
  jq.x86_64 0:1.6-2.el7
 
Complete!

Para imprimir el objeto completo, use jq .

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[root@tutorialspots ~]# curl -s http://dummy.restapiexample.com/api/v1/employees | jq .
{
  "status": "success",
  "data": [
    {
      "id": "1",
      "employee_name": "Tiger Nixon",
      "employee_salary": "320800",
      "employee_age": "61",
      "profile_image": ""
    },
    {
      "id": "2",
      "employee_name": "Garrett Winters",
      "employee_salary": "170750",
      "employee_age": "63",
      "profile_image": ""
    },
    {
      "id": "3",
      "employee_name": "Ashton Cox",
      "employee_salary": "86000",
      "employee_age": "66",
      "profile_image": ""
    },
    {
      "id": "4",
      "employee_name": "Cedric Kelly",
      "employee_salary": "433060",
      "employee_age": "22",
      "profile_image": ""
    },
    {
      "id": "5",
      "employee_name": "Airi Satou",
      "employee_salary": "162700",
      "employee_age": "33",
      "profile_image": ""
    },
    {
      "id": "6",
      "employee_name": "Brielle Williamson",