这篇文章主要介绍了Linux下jq命令怎么使用的相关知识，内容详细易懂，操作简单快捷，具有一定借鉴价值，相信大家阅读完这篇Linux下jq命令怎么使用文章都会有所收获，下面我们一起来看看吧。
jq 是一个轻量级的json处理命令。可以对json数据进行分片、过滤、映射和转换。
[root@test-dhcp ~]# yum install jq
[root@test-dhcp ~]# jq -n {a:1}{
"a": 1
}
[root@test-dhcp ~]# jq -n '{a:"test"}'{
"a": "test"}[root@test-dhcp ~]# jq -n '{a:"test"} + {b:2}'{
"a": "test",
"b": 2
}
[root@test-dhcp ~]# jq -n '{a:"test"} + {b:2} + {c:"testc"}'{
"a": "test",
"b": 2,
"c": "testc"}[root@test-dhcp ~]# cat test.json{"a": "test","b": 2, "c": "testc"}
[root@test-dhcp ~]# cat test.json |jq .{
"a": "test",
"b": 2,
"c": "testc"}
[root@test-dhcp ~]# cat test.json |jq 'del(.b)'{
"a": "test",
"c": "testc"}[root@test-dhcp ~]# cat test.json{"a": "test","b": 2, "c": "testc"}
[root@test-dhcp ~]# cat test.json |jq '.b="testb"'{
"a": "test",
"b": "testb",
"c": "testc"}
[root@test-dhcp ~]# cat test.json |jq '. + {d:4}'{
"a": "test",
"b": 2,
"c": "testc",
"d": 4
}
[root@test-dhcp ~]# cat test.json |jq '. + {d:4}' |jq '.d={dd:5}'{
"a": "test",
"b": 2,
"c": "testc",
"d": {
"dd": 5
}
}[root@test-dhcp ~]# cat test.json |jq .{
"a": "test",
"b": 2,
"c": "testc",
"d": {
"dd": 5
}
}
[root@test-dhcp ~]# cat test.json |jq '. + {d:4}' |jq '.d={dd:5}' |jq .d.dd5
[root@test-dhcp ~]# echo '{"a":1,"b":2}' |jq '[.a,.b]'[
1,
2
][root@test-dhcp ~]# echo "{}" |jq -r typeobject
[root@test-dhcp ~]# echo '[0, false, [], {}, null, "hello"]' |jq 'map(type)'[
"number",
"boolean",
"array",
"object",
"null",
"string"][root@test-dhcp ~]# echo [1,2,3] |jq .[1]2 [root@test-dhcp ~]# echo [1,2,3] |jq .[2]3
[root@test-dhcp ~]# echo [1,2,3,9] |jq '.|length'4 [root@test-dhcp ~]# echo [1,2,3] |jq '.|length'3
[root@test-dhcp ~]# echo [1,2,3] |jq '. + [4,5,6]'[ 1, 2, 3, 4, 5, 6 ]
[root@test-dhcp ~]# echo [1,2,3] | jq 'map(select(. >= 2))'[
2,
3
]
[root@test-dhcp ~]# echo [1,2,3] | jq 'map(select(. == 2))'[
2
]
[root@test-dhcp ~]# echo [1,2,3] | jq 'map(select(. != 2))'[
1,
3
]
[root@test-dhcp ~]# cat test.json[
{
"id": "0",
"model": "Intel(R)Xeon(R)CPUE5-2620v4@2.10GHz" },
{
"id": "1",
"model": "Intel(R)Xeon(R)CPUE5-2620v4@2.10GHz" }
]
[root@test-dhcp ~]# cat test.json |jq .[].model"Intel(R)Xeon(R)CPUE5-2620v4@2.10GHz""Intel(R)Xeon(R)CPUE5-2620v4@2.10GHz"[root@test-dhcp ~]# echo '["a","b,c,d","e"]' |jq 'join(",")'"a,b,c,d,e"[root@test-dhcp ~]# echo '["a","b,c,d","e",1]' |jq 'join(",")'jq: error (at :1): string (",") and number (1) cannot be added
[root@test-dhcp ~]# cat test.jsonliuxin,30,male
jiaweiqiang,29,femal
[root@test-dhcp ~]# jq -R 'split(",")|{"name":.[0],"age":.[1],"sex":.[2]}' ./test.json{
"name": "liuxin",
"age": "30",
"sex": "male"}
{
"name": "jiaweiqiang",
"age": "29",
"sex": "femal"}
[root@test-dhcp ~]# cat test.json{
"name": "liuxin",
"age": "30",
"sex": "male"}
{
"name": "jiaweiqiang",
"age": "29",
"sex": "femal"}
[root@test-dhcp ~]# cat test.json |jq . -c{"name":"liuxin","age":"30","sex":"male"}
{"name":"jiaweiqiang","age":"29","sex":"femal"}关于“Linux下jq命令怎么使用”这篇文章的内容就介绍到这里，感谢各位的阅读！相信大家对“Linux下jq命令怎么使用”知识都有一定的了解，大家如果还想学习更多知识，欢迎关注亿速云行业资讯频道。
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