有些Linux服务API返回的数据为JSON数据，但是直接在命令行看，看起来很不方便，都拧巴在一起了，比如这样。
[root@songshucang nginx]# curl http://localhost:8500/v1/catalog/service/xxx
[{"ID":"5c82060b-caa6-082c-27ac-4e64d38d35f1","Node":"izwz99ridy7gp33ry7hmfqz","Address":"172.18.177.227","Datacenter":"default","TaggedAddresses":{"lan":"172.18.177.227","wan":"172.18.177.227"},"NodeMeta":{"consul-network-segment":""},"ServiceID":"application-ecs-8090","ServiceName":"songshu-cang","ServiceTags":["songshu"],"ServiceAddress":"172.18.177.227","ServicePort":8090,"ServiceEnableTagOverride":false,"CreateIndex":502,"ModifyIndex":502},{"ID":"5c82060b-caa6-082c-27ac-4e64d38d35f1","Node":"izwz99ridy7gp33ry7hmfqz","Address":"172.18.177.227","Datacenter":"default","TaggedAddresses":{"lan":"172.18.177.227","wan":"172.18.177.227"},"NodeMeta":{"consul-network-segment":""},"ServiceID":"application-ecs-8091","ServiceName":"songshu-cang","ServiceTags":["songshu"],"ServiceAddress":"172.18.177.227","ServicePort":8091,"ServiceEnableTagOverride":false,"CreateIndex":520,"ModifyIndex":520}][root@songshucang nginx]#
不过Linux内置了一些命令，比如jq
[root@songshucang nginx]# yum info jq
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
Installed Packages
Name : jq
Arch : x86_64
Version : 1.5
Release : 1.el7
Size : 351 k
Repo : installed
From repo : epel
Summary : Command-line JSON processor
URL : http://stedolan.github.io/jq/
License : MIT and ASL 2.0 and CC-BY and GPLv3
Description : lightweight and flexible command-line JSON processor
:
: jq is like sed for JSON data – you can use it to slice
: and filter and map and transform structured data with
: the same ease that sed, awk, grep and friends let you
: play with text.
:
: It is written in portable C, and it has zero runtime
: dependencies.
:
: jq can mangle the data format that you have into the
: one that you want with very little effort, and the
: program to do so is often shorter and simpler than
: you'd expect.
安装与使用jq
sudo yum install jq -y
使用jq
总结
简单的介绍了一个Linux的命令。
