Linux jq 命令_系统运维

概述IBM 官方 jq 文档：https://www.ibm.com/developerworks/cn/linux/1612_chengg_jq/index.html?ca=drs-&utm_source=tuicool&utm_medium=referraljq命令允许直接在命令行下对JSON进行 *** 作，包括分片、过滤、转换等 JSON(JavaScript Object Notat

IBM 官方 jq 文档：https://www.ibm.com/developerworks/cn/linux/1612_chengg_jq/index.html?ca=drs-&utm_source=tuicool&utm_medium=referral

jq命令允许直接在命令行下对JsON进行 *** 作，包括分片、过滤、转换等
JsON(JavaScript Object Notation) 是一种轻量级的数据交换格式。基于JavaScript(Standard ECMA-262 3rd Edition - December 1999)的一个子集
JsON 数据的书写格式是：名称/对象。
JsON的结构基于两点

“名称/值”的集合,在不同的语言中,它可以被理解为对象(object)，记录(record)，结构(struct)，字典(dictionary)，哈希表(hash table)，键列表(keyed List)等 .

值的有序列表多数语言中被理解为数组(array)

JsON的基础结构说明

对象是属性、值的集合。一个对象开始与”{”,结束于”}”。每一个属性名和值间用”:”分隔。每个属性间用”，”分隔。值可以是字符串，数字，逻辑值，数组，对象，null。
数字：整数或浮点数
字符串：在双引号中
逻辑符：true和false
数组：在方括号中
对象：在花括号中
null：代表空

Ubuntu下的jq安装

apt-get install jq

jq命令的格式

jq [options] filter [files]**options：**--version：输出jq的版本信息并退出--slurp/-s：读入整个输入流到一个数组。--raw-input/-R：不作为JsON解析，将每一行的文本作为字符串输出到屏幕。--null-input/ -n：不读取任何输入，过滤器运行使用null作为输入。一般用作从头构建JsON数据。--compact-output /-c：使输出紧凑，而不是把每一个JsON对象输出在一行。--colour-output / -C：打开颜色显示--monoChrome-output / -M：关闭颜色显示--ascii-output /-a：指定输出格式为ASCII-raw-output /-r ：如果过滤的结果是一个字符串，那么直接写到标准输出（去掉字符串的引号）**filter：**.   : 默认输出.foo: 输出指定属性，foo代表属性。.[foo] ：输出指定数组元素。foo代表数组下标。.[]：输出指定数组中全部元素， ：指定多个属性作为过滤条件时，用逗号分隔| ： 将指定的数组元素中的某个属性作为过滤条件**files：**    JOSN格式文件。

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用作示例的JOSN文件。

[{"hostCompany":"Beijing Autelan Technology","hostModel":"CS-VIC-2000-C","hostsn":"01010730b12014A00477","mac":"00:1F:64:CE:F3:8E","cpuModel":"MIPS 74Kc V4.12","cpuSN":"000000","memoryModel":"abcdefg","memorySN":"000000","boardSN":"01010730b12014A00477","networkCardMac":"00:1F:64:CE:F3:8F","lowFreModel":"AR9344","lowFreSN":"000000","hignFreModel":"AR9582","hignFreSN":"000000","gpsModel":"abcdefg","gpsSN":"000000","MEID_3g":"A000004E123ABD2","Company_3g":"ZTEMT INCORPORATED","modelOf3g":"MC271X","snOf3g":"A000004E123ABD2","iccid":"89860314400200885980","Operators":"CTCC","hardVersion":"1.20","firmwareversion":"1.0.6.29"}]

示例：

$ jq . APInfo.Json   [  {    "firmwareversion": "1.0.6.29","hardVersion": "1.20","Operators": "CTCC","iccid": "DATA DATA","snOf3g": "A000004E123ABD2","modelOf3g": "MC271X","Company_3g": "ZTEMT INCORPORATED","MEID_3g": "A000004E123ABD2","memorySN": "000000","memoryModel": "abcdefg","cpuSN": "000000","cpuModel": "MIPS 74Kc V4.12","mac": "00:1F:64:CE:F3:8E","hostsn": "01010730b12014A00477","hostModel": "CS-VIC-1999-C","stCompany": "Beijing Autelan Technology","boardSN": "01010730b12014A00477","networkCardMac": "00:1F:64:CE:F3:8F","lowFreModel": "AR9344","lowFreSN": "000000","hignFreModel": "AR9582","hignFreSN": "000000","gpsModel": "abcdefg","gpsSN": "000000"  }]jq .[] APInfo.Json {  "firmwareversion": "1.0.6.29","gpsSN": "000000"}

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$ jq -r .[].mac APInfo.Json 00:1F:64:CE:F3:8E$ jq -r '.[] | .mac' APInfo.Json 00:1F:64:CE:F3:8E$ jq -r '.[] |.mac,.gpsSN' APInfo.Json 00:1F:64:CE:F3:8E000000jq -r '.[].mac,.[].gpsSN' APInfo.Json 00:1F:64:CE:F3:8E000000