linux 中格式化json字符串

用法如下：

[root@iZbp143t3oxhfc3ar7jey0Z 84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351]# yum -y install jq
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package jq.x86_64 0:1.6-1.el7 will be installed
--> Processing Dependency: libonig.so.2()(64bit) for package: jq-1.6-1.el7.x86_64
--> Running transaction check
---> Package oniguruma.x86_64 0:5.9.5-3.el7 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

==========================================================================================================================================================
 Package                               Arch                               Version                                  Repository                        Size
==========================================================================================================================================================
Installing:
 jq                                    x86_64                             1.6-1.el7                                epel                             167 k
Installing for dependencies:
 oniguruma                             x86_64                             5.9.5-3.el7                              epel                             129 k

Transaction Summary
==========================================================================================================================================================
Install  1 Package (+1 Dependent package)

Total download size: 296 k
Installed size: 936 k
Downloading packages:
(1/2): jq-1.6-1.el7.x86_64.rpm                                                                                                     | 167 kB  00:00:00
(2/2): oniguruma-5.9.5-3.el7.x86_64.rpm                                                                                            | 129 kB  00:00:00
----------------------------------------------------------------------------------------------------------------------------------------------------------
Total                                                                                                                     2.4 MB/s | 296 kB  00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Installing : oniguruma-5.9.5-3.el7.x86_64                                                                                                           1/2
  Installing : jq-1.6-1.el7.x86_64                                                                                                                    2/2
  Verifying  : jq-1.6-1.el7.x86_64                                                                                                                    1/2
  Verifying  : oniguruma-5.9.5-3.el7.x86_64                                                                                                           2/2

Installed:
  jq.x86_64 0:1.6-1.el7

Dependency Installed:
  oniguruma.x86_64 0:5.9.5-3.el7

Complete!

 效果如下：

[root@iZbp143t3oxhfc3ar7jey0Z 84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351]# cat config.v2.json | jq .
{
  "StreamConfig": {},
  "State": {
    "Running": false,
    "Paused": false,
    "Restarting": false,
    "OOMKilled": false,
    "RemovalInProgress": false,
    "Dead": false,
    "Pid": 0,
    "ExitCode": 0,
    "Error": "",
    "StartedAt": "2020-03-03T06:28:02.825548595Z",
    "FinishedAt": "2020-03-03T06:38:25.521104656Z",
    "Health": null
  },
  "ID": "84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351",
  "Created": "2020-03-03T06:28:01.680148213Z",
  "Managed": false,
  "Path": "nginx",
  "Args": [
    "-g",
    "daemon off;"
  ],
  "Config": {
    "Hostname": "84bd26b94eec",
    "Domainname": "",
    "User": "",
    "AttachStdin": false,
    "AttachStdout": false,
    "AttachStderr": false,
    "ExposedPorts": {
      "80/tcp": {}
    },
    "Tty": false,
    "OpenStdin": false,
    "StdinOnce": false,
    "Env": [
      "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
      "NGINX_VERSION=1.17.8",
      "NJS_VERSION=0.3.8",
      "PKG_RELEASE=1~buster"
    ],
    "Cmd": [
      "nginx",
      "-g",
      "daemon off;"
    ],
    "ArgsEscaped": true,
    "Image": "nginx",
    "Volumes": null,
    "WorkingDir": "",
    "Entrypoint": null,
    "OnBuild": null,
    "Labels": {
      "maintainer": "NGINX Docker Maintainers <docker-maint@nginx.com>"
    },
    "StopSignal": "SIGTERM"
  },
  "Image": "sha256:a1523e859360df9ffe2b31a8270f5e16422609fe138c1636383efdc34b9ea2d6",
  "NetworkSettings": {
    "Bridge": "",
    "SandboxID": "af07ef432aa54450bb224510e47233ff874f73ab9c5c23e197cc964416801300",
    "HairpinMode": false,
    "LinkLocalIPv6Address": "",
    "LinkLocalIPv6PrefixLen": 0,
    "Networks": {
      "bridge": {
        "IPAMConfig": null,
        "Links": null,
        "Aliases": null,
        "NetworkID": "f9c6306568ccdd1b28efdcdcfa9ab610556441b9d5f1f5710da615eefa955fd5",
        "EndpointID": "",
        "Gateway": "",
        "IPAddress": "",
        "IPPrefixLen": 0,
        "IPv6Gateway": "",
        "GlobalIPv6Address": "",
        "GlobalIPv6PrefixLen": 0,
        "MacAddress": "",
        "IPAMOperational": false
      }
    },
    "Service": null,
    "Ports": null,
    "SandboxKey": "/var/run/docker/netns/af07ef432aa5",
    "SecondaryIPAddresses": null,
    "SecondaryIPv6Addresses": null,
    "IsAnonymousEndpoint": false,
    "HasSwarmEndpoint": false
  },
  "LogPath": "",
  "Name": "/nginx",
  "Driver": "overlay2",
  "MountLabel": "",
  "ProcessLabel": "",
  "RestartCount": 0,
  "HasBeenStartedBefore": true,
  "HasBeenManuallyStopped": false,
  "MountPoints": {},
  "SecretReferences": null,
  "AppArmorProfile": "",
  "HostnamePath": "/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/hostname",
  "HostsPath": "/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/hosts",
  "ShmPath": "/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/shm",
  "ResolvConfPath": "/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/resolv.conf",
  "SeccompProfile": "",
  "NoNewPrivileges": false
}

没有用的如下：

[root@iZbp143t3oxhfc3ar7jey0Z 84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351]# cat config.v2.json
{"StreamConfig":{},"State":{"Running":false,"Paused":false,"Restarting":false,"OOMKilled":false,"RemovalInProgress":false,"Dead":false,"Pid":0,"ExitCode":0,"Error":"","StartedAt":"2020-03-03T06:28:02.825548595Z","FinishedAt":"2020-03-03T06:38:25.521104656Z","Health":null},"ID":"84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351","Created":"2020-03-03T06:28:01.680148213Z","Managed":false,"Path":"nginx","Args":["-g","daemon off;"],"Config":{"Hostname":"84bd26b94eec","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":{"80/tcp":{}},"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":["PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin","NGINX_VERSION=1.17.8","NJS_VERSION=0.3.8","PKG_RELEASE=1~buster"],"Cmd":["nginx","-g","daemon off;"],"ArgsEscaped":true,"Image":"nginx","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":{"maintainer":"NGINX Docker Maintainers u003cdocker-maint@nginx.comu003e"},"StopSignal":"SIGTERM"},"Image":"sha256:a1523e859360df9ffe2b31a8270f5e16422609fe138c1636383efdc34b9ea2d6","NetworkSettings":{"Bridge":"","SandboxID":"af07ef432aa54450bb224510e47233ff874f73ab9c5c23e197cc964416801300","HairpinMode":false,"LinkLocalIPv6Address":"","LinkLocalIPv6PrefixLen":0,"Networks":{"bridge":{"IPAMConfig":null,"Links":null,"Aliases":null,"NetworkID":"f9c6306568ccdd1b28efdcdcfa9ab610556441b9d5f1f5710da615eefa955fd5","EndpointID":"","Gateway":"","IPAddress":"","IPPrefixLen":0,"IPv6Gateway":"","GlobalIPv6Address":"","GlobalIPv6PrefixLen":0,"MacAddress":"","IPAMOperational":false}},"Service":null,"Ports":null,"SandboxKey":"/var/run/docker/netns/af07ef432aa5","SecondaryIPAddresses":null,"SecondaryIPv6Addresses":null,"IsAnonymousEndpoint":false,"HasSwarmEndpoint":false},"LogPath":"","Name":"/nginx","Driver":"overlay2","MountLabel":"","ProcessLabel":"","RestartCount":0,"HasBeenStartedBefore":true,"HasBeenManuallyStopped":false,"MountPoints":{},"SecretReferences":null,"AppArmorProfile":"","HostnamePath":"/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/hostname","HostsPath":"/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/hosts","ShmPath":"/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/shm","ResolvConfPath":"/var/lib/docker/containers/84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351/resolv.conf","SeccompProfile":"","NoNewPrivileges":false}
[root@iZbp143t3oxhfc3ar7jey0Z 84bd26b94eec4e52a712649207be6468fd4484d824bcfc37ebac5305e1398351]