Bash extract json key value extract specific key value from json in bash if key matches. Try Teams for free Explore Teams Nov 17, 2015 · For example, I saved your sample json file as raul. For example, using a bash shell with mapfile (aka readarray): mapfile -t ary < <(< json_file jq '. For example: How to get a value from json based on key in bash. Extract values from JSON object using standard utilities. Aug 6, 2013 · var json = $. Jun 10, 2014 · extract specific key value from json in bash if key matches. JSON format must be processed with JSON-aware tools. I can create another json using the basic command: cat old. Please help me with some commands – Jubin Mehta. It is unreasonable to be expected to perform one's job using the wrong tools, and parsing JSON in a shell script using awk or other text-processing tools that are not JSON-aware is simply not a cost effective way to do your job in the long run. e. 12. ) Mar 4, 2015 · Whenever you are trying to reference a key that is not a valid identifier, you have to quote it. my_name) Sep 22, 2015 · How to get a value from json based on key in bash. json Mar 5, 2020 · Extracting a json value from bash shell using awk without having to resort to both awk and sed 3 JSON: Extract and print both key and value pair for value matching pattern Aug 7, 2023 · Here we learn how to read JSON file in Bash scripting. 2. Sep 23, 2021 · How can I access the key and value in BASH and/or jq? I have a command shown below: How can I extract the value of each key in each JSON block (as the same row Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. events. This section will delve into various methods to retrieve values effectively, ensuring you can handle both simple and complex JSON structures. we're making each [key, value] pair into an object of Extract json values Using Bash 4. parse(require("fs"). State, VolumeId: . Note the outer parantheses around the command. ruby/python/perl/ how to extract key value from bash string. py-- and the use of a . Rankin Apr 21, 2022 · Assuming you can't use the aws command to do this, I would personally use the JSON parser jq to extract the wanted data. json Aug 1, 2018 · @SubodhJoshi, yes, as I said, it's for the ksh93 shell (recent versions: ksh93v- and newer), not the bash shell. cat foo | bar gives bar only a FIFO, whereas bar <foo gives it a real file handle for its stdin; that's an especially big deal when bar is something that can benefit from being able to seek() around in its input (f/e, to Dec 12, 2012 · I am extracting values from a cloud foundry command. Jun 11, 2015 · Or even with Bash -ONLY if you are confident about the file not grep command to find the value of key from json. 1853. jq '. You can access a specific value within this nested structure by chaining key names: Since you're dealing with raw objects, the above for. Most of bash's syntax and features have been copied from ksh, however it's far from being a full clone. The code used is. sh-- which forces the shebang to be ignored and a baseline-POSIX shell to be used instead. 1369353600000. Finally, . , if your curl response was a multi-line JSON (which is quite often the case), then most likely the sed based solution would not work right for you. Extract a JSON value from a BASH script. id from the result of map like this: How to get a value from json based on key in bash. loads() creates a dictionary, so to get its values, you do so as you would get the values in a dictionary. But I am unable to do so, have tried follow up lots of links and suggestion, probably I am doing something wrong. json May 12, 2019 · What format is this data in? Is it JSON? – melpomene. E. Parsing json with awk/sed in bash to get key value pair. Try Teams for free Explore Teams Jan 28, 2017 · The above command isn't easily generalized to an arbitrary number of key-value pairs to output per line, because the because the array indices (0 and 1) are explicitly specified. json 409. First, we start with a discussion of the format itself. Nov 21, 2019 · "key": "value" I want to use regex to match just the values without quotation marks (this is for a a bash script). For e. awk -F= '$1=="Var"{print $2}' This reads the key-value pairs. Here is how the file looks like: User-Provided: end: 123. $ echo "${value[@]}" aaaa bbbb $ echo "${value[0]}" aaaa $ echo "${value[1]}" bbbb Sep 16, 2019 · System. $ echo "test:5 hi there" | extract_key_value test. I tried to create a regex in the lines of "Match second occurrence of all alphanumeric characters within quotes" but haven't been able to make it work successfully. Aug 30, 2016 · Rather than populating separate shell variables (which would require knowing in advance how many values there are), consider populating a shell array. 1 409. Parse variables out of a "key1='val1' key2='val2'" string in bash without eval. See code below. Volumes[] | { State: . Save a json value as Mar 20, 2018 · How can I do a loop with json keys result in bash script? Looping through a json file and retrieving the values into bash variables Iterate over JSON data for . Hot Network Questions The availability of parsers in nearly every programming language is one of the advantages of JSON as a data-interchange format. Dec 24, 2009 · To quickly extract the values for a particular key, I personally like to use "grep -o", which only returns the regex's match. Since the field separator is chosen to be =, the key ends up as field 1 and the value as field 2. As an aside, I think the API response you're using is too generic & large to be helpful. Tags }' For each entry in the Volumes array, this would create a new JSON object containing only the fields you want to keep from that entry. Extract values in json object with awk/sed, but cannot get it to work. Get value from nested json - Bash. Here's the sample output. 4. I want to do this because it will be faster as the main JSON is pretty big with millions of records. 5 25. tool', or 'jq' with the syntax, echo '{"key":"value"}' | jq '. test1=foo. Jun 9, 2018 · I am trying my hand on shell scripting and was trying to extract values from a Json and store it into a variable to use it later. Iteration over a dictionary is an iteration over its keys (for j in data: is the same as for j in data. Jun 22, 2018 · #!/bin/bash LOGIN_DATA=$(\ curl -d " Extract a specific key's value from a JSON file. This creates a filter from the key name. In this case the Output for my shell command must give the result as "QAT" Apr 28, 2020 · You can easily output whatever value you like: $ awk -v k=name -f tst. In case he means using terminal, the node cli is an alternative, since support for JSON is total. May 10, 2021 · I'm trying to extract value of a branch from the below json/test. Parse JSON object's members into Bash variables. Extracting specific values from a JSON file in Bash can be easily done using jq. We also need to tell jq which JSON file to use. Provide details and share your research! But avoid …. Mar 25, 2019 · I need to extract the value for request ID in the below json message {"requestId":"2ef095c8-cec6-4fb2-a4fc-3c036f9ffaa1"} I don't have JQ command in my OS. json_val={"code":"lyz1To6ZTWClDHSiaeXyxg","redirec Jan 11, 2019 · Above is my json response which is stored in a. Nov 22, 2019 · Thanks so much for taking the time to share your knowledge and expertise. sh Sep 28, 2017 · hi i am writings a small shell script. parseJSON(data); json[16]. These tools can interpret JSON data, making it easier to handle in your scripts. how to jq by the desired key is inside nested json. id' infile. The JSON format is like following: Aug 28, 2013 · looks like json. Dec 27, 2014 · grep command to find the value of key from json. Is there any way that I can get the values from the JSON when executing it? For example, I'like to output id, body, and age's value Mar 29, 2017 · BTW, if your shebang specifies bash, then you shouldn't use sh script. *) regular expression; Then we use the $1 matching group to retrieve the value. Ignoring the broken JSON Aug 24, 2015 · I need to write a bash script to attach Amazon EBS volumes to a given instance based on the Name tag of the volume. . Inspired by peak's helpful answer , which shows a simple example of defining a helper function in jq , the following variant uses a combination of built-in functions Extract data from JSON file using bash [duplicate] Ask Question Set environment variables from file of key/value pairs. Jun 29, 2013 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Sep 12, 2014 · I have a file with the return of a curl statement in it, in the form of json. 12 text_pass: 980 KEY: 000 Running Environment Jul 19, 2022 · I have a file in which some lines contain a json object on a single line, and I want to extract the value of the window_indicator property. Something like: echo $json | grep -oE '"access_token":"[^"]+' | sed -e 's/"access_token":"\(. value extracts the value from the filtered key-value pairs. json and then ran: $ jq . Use the JSONPath expression $. "1" For your other question on how to obtain the my_name values, you could do this: to_entries | map(. The tag is in the format of "device on servername" e. 5 Note that I don't care what it's written in, so node, ruby, etc is fine by me, but portability (Linux/osx) is nice ;-) input1 this is test:5 i saw a value input2 Dec 26, 2017 · extract specific key value from json in bash if key matches. Aug 25, 2019 · As you can see, what i want to do is extract the ID number 342 and put it in the new json with a different key name. json. awk file "2" $ awk -v k=version -f tst. json | jq '{temp:. log(JSON. message. *"job"/ {print $2}' filename Above command matches any line that has "job" at the beginning of a line, and then prints the second column of that line. Next, we look at native shell implementations for handling JSON. ["image_id"]' <new. Th Oct 31, 2022 · In bash, I would like to extract in variable the value of the first occurance of the key "ReferenceId" where the key "Name" equal "bbb". Extract key value from a string with known Sep 23, 2020 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. It has to be done via the shell. you want to create sounds dictionary then,. The -r option outputs the raw value without quotes, storing the result in the number variable. should result in. given any of the following inputs, it should be able to pull out the value of the test key. "/dev/xvdf on linuxserver Jan 19, 2022 · How can I fetch the value of a key-value pair in a JSON using shell script I do not know the positions of key-value pairs in the JSON, I will have to search and get the value of the key-value pair. Mar 18, 2024 · In this tutorial, we’ll delve into many ways to parse, validate, and tidy up a JSON object for human consumption. , etc. Sep 20, 2013 · I know it is difficult to parse json in bash using sed/awk but I only need a few key-value pairs per record out of a whole list of key-value pairs per record. Shell Script - get values from JSON. Aug 18, 2016 · Extract JSON value in Bash [duplicate] Ask Question Asked 8 years, 4 months ago. Jan 11, 2019 · I want to extract the value of customfield_11500 from this a. burstevents[i] But I can't do that with the JSON below because they're key value pairs. json null 40 null jq is available pre-packaged for most linux distros. After that, we check out several tools for the same purpose. Thus, we just look for lines whose first field is Var and print the corresponding value. Bash JSON parsing refers to the techniques used in the Bash environment to extract information from JSON data. `jq` is a powerful command-line JSON processor that allows you to parse, filter, and transform JSON data in a flexible and efficient way using simple Bash commands. I tough jq is too much for this simple JSON. I was planning to do it with a Apr 30, 2015 · YAML obviously isn't natively supported in shell. json file using jq { "pipeline": { "name": "test";, "roleArn": "arn: value=($(jq -r '. Aug 18, 2017 · extract specific key value from json in bash if key matches. VolumeId, Tags: . (I may not be phrasing that right) Output of a curl command: will post in comment as I am unable to post here I want to g Apr 2, 2019 · I need a regex to delete the object that contains "options" as key and the expected json looks like below, (json must be affect with changes) { "indexes": [ some data] } regex Aug 19, 2018 · jq and bash : get a specific value in json when other key value pair matches. json is the Right Thing. Feb 14, 2020 · The simplest way to extract data from a JSON file is to provide a key name to obtain its data value. data. find and replace a value in a json file using bash. Feb 1, 2019 · e. The string is as follows. See the manual for more details. The jq command is used to parse the JSON data. I want to extract the value of customfield_11500 from this a. How to do it. id to extract the ConsumeKafka id to an attribute on the flowfile. prototype, but let's assume not). May 22, 2020 · Extract a value from a nested json key in bash Hot Network Questions In the Silmarillion or the Appendices to ROTK, do the Dwarves of Khazad-dûm know about the Balrog below prior to Durin receiving the ring? Mar 13, 2019 · Extract key value in shell script. processors[?(@. – Jun 16, 2020 · I am working on an assignment about parsing JSON by shell script. Try Teams for free Explore Teams Apr 7, 2022 · How to extract value from json contained in a variable using jq in bash. GitHub Gist: instantly share code, notes, and snippets. Jul 9, 2020 · extract specific key value from json in bash if key matches. Ps: If you want to remove the quotes from a line, that is a great job for sed : Jul 12, 2024 · It consists of key-value pairs, arrays, and nested objects, which together make JSON a versatile format for data storage and communication. 16. awk option -F is used to set the column separator as : followed by any number of spaces or tabs. How do I extract just the unix timestamp from the JSON below? (i. Sep 17, 2019 · awk can do all the work of tr and grep and sed, and cat is never needed when reading only a single file (its job is to concatenate multiple files into a single stream). sh is appropriate in that case (though the use of an extension is a bit questionable altogether -- commands don't conventionally have extensions on UNIX, after all; you don't run ls. declare -A sounds sounds[dog]="Bark" sounds[wolf]="Howl" Nov 26, 2016 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jun 4, 2013 · I am trying to use sed to extract the value part of one of the many key-value pairs in a URL's query string -r is used for GNU sed which is standard on Linux May 11, 2024 · Here, we use the to_entries[] function to convert each object in the array into an array of key-value pairs. 0. How do I extract a Value from a Key in an Array from a json object using jq? 1. jq provides a wide range of features for querying and filtering JSON data, allowing you to extract specific values based on various conditions. Is there another way I can do it, poss Jan 22, 2020 · Using jq to parse out the value of the Value key in the top-level Parameter structure: aws ssm get-parameter --name /mysite/dev/email | jq -r '. Lookup DeviceType and be able to print Value4 Mar 17, 2016 · The OP asks for solutions using grep. Var1=Value1 Var2=Value2 Var3=Value3 I have converted them to variables using the below construct Jan 30, 2018 · None of the existing answers preserve whitespace in the values in a POSIX shell. How to get a value from json based on key in bash. [ "bucketName=myBucket", ] It exists in a separate json file called parameters. I would get "1" for "a". Linux local 5. Jul 5, 2021 · How to get a value from json based on key in bash. Asking for help, clarification, or responding to other answers. I have input file. temperature raul. But sed also isn't a YAML parser. Get Value by Key in Nested JSON. json 4dCYd4W9i6gHQHvd To extract values from JSON objects in Bash, you can utilize the powerful jq tool, which is designed for parsing and manipulating JSON data. message iss. component. Extract sentences from a json file using bash. Oct 24, 2019 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 6. Explore Teams Assuming that I have to extract the key and the value both. It needs to read the value next to the Content or from any other variable. If for some reason, you have to work with an XML file over bash, this post will cover many examples to extract the values from an XML file. 0-27-lowlatency #28-Ubuntu SMP PREEMPT Tue Aug 20 20:33:37 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux Issue. You could use the -E / --extended-regexp argument of grep (to select the wanted key-value) and then pipe sed (to remove the key). JSON, or JavaScript Object Notation, is widely usage due to its simplicity and ease of integration with various programming environments, especially for configuring applications and handling API responses. Type a period and the key name without a space between them. JSON: Extract and print both key and value pair for value matching pattern. Jan 30, 2023 · If you are asking in a professional capacity, then I would propose that you jump through the necessary hoops to get jq installed on your production system. json "4dCYd4W9i6gHQHvd" This is just a simple filter for the id key in the data object. Hot Network Questions May 24, 2018 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. If you cannot install jq, the following awk solution is an alternative, but note that it is much less robust and relies on the JSON to be formatted exactly as above. Nov 5, 2015 · There exists a pattern on each line that can be described as key and value: "key": "value" We can use perl with regular expressions to exact the value for any given key: "key" hardcoded for each case "install_home", "tmp_dir" and "user" "value" as (. In particular bash doesn't support ksh's compound variables. name') You could alternatively use a shell while loop. Parsing JSON data in Bash is useful for quick data manipulation and automation tasks, and is easily-integrated into Bash scripting. humidity raul. jq: Unable to retrieve a key/value from Json file using jq. readFileSync(0). Read man cut, man tr and do something like: tr -d '{}' |\ cut '-d"' -f4 )" Apr 4, 2013 · extract specific key value from json in bash if key matches. In this case the Output for my shell command must give the result as "QAT" Formatted JSON for the scrolling-averse: "expand": "renderedFields,names,schema,operations,editmeta,changelog,versionedRepresentations", "id": "15114", Jan 17, 2020 · At some point I need to run this command (aws iot get-registration-code) and I receive back the answer in JSON (Not a file). 1. Parameter. toString()). Aug 18, 2016 · extract specific key value from json in bash if key matches. Jun 4, 2019 · You can use the EvaluateJSONPath processor to extract JSON values to flowfile attributes. key)' //prints 42 Sep 13, 2017 · Is there a way to read all key-value pairs in the JSON file and then initialize all variables accordingly in shell? transform json to key/value file in bash. g. keys():); however, to iterate over its values, you need to use . bash script. jq '. I just need to retrieve the value, store in a variable and send to another process. bucketName' parameters. what it return is a status of a scan. I'm pretty sure you'd need an actual language in which to write a proper parser. Here's a basic example of using `jq` to extract a value from a JSON object: Jul 8, 2020 · Add bash variable as JSON key and value into object. *?[^\\]",' tweets. value. Extract values in json object with awk/sed, but Jan 22, 2017 · I have a JSON output that contains a list of objects stored in a variable. awk file 1 and it'd be trivial to modify to output multiple values in any order you like, or only output the value of one key if it's in a range or based on relationships between other keys values, etc. One alternative could be the command node --eval "script" echo '{"key": 42}' \ | node -e 'console. We type the following to retrieve the message value: jq . Line 2: Read the contents of the file names. Bash regex match on JSON structure. "sub-example"[]. How to parse json Aug 12, 2012 · (Linux) Extract JSON value using Grep specifically (no json parser) Hot Network Questions You're winning on the chessboard, but losing on the clock. Feb 15, 2020 · Parsing json with awk/sed in bash to get key value pair. Jan 9, 2020 · This is certainly the simplest, and for small files, making 3 passes of the file to get the three variables out will be fine, but for a larger input file, sed can generate a smaller fragment containing all 3 tags in a single pass, which would then be processed by bash regex. How to get an element of a JSON object in bash? 0. json and stores them in a variable named json. name=="ConsumeKafka")]. Apr 25, 2019 · That said, don't use cat either. elf or 2to3. parsing/extract json data with jq. 5 $ jq . A normal regular expression is: "window_indicator":\s*([\-\d\. Jul 19, 2018 · Ask questions, find answers and collaborate at work with Stack Overflow for Teams. 0, 1371600000000. jq extract data of json. Aug 11, 2017 · But the sed solution I have there is better than the other because it will support the key, values in the JSON string being in different order. *\)/\1/' Or, even better, use the -P / --perl-regexp argument of grep with look-behind and look-ahead. This places each key,value pair on its own line. json I am getting the following error: Aug 10, 2016 · I am trying to create a json object from a string in bash. key1' jsonFile)) you are assigning both values to an array. Ask Question Asked 2 years, 10 months ago. Apr 21, 2020 · I have a text file that contains key value pairs in the format. 5. Rather than trying to implement a JSON parser, you are likely better off using either a tool built for JSON parsing such as jq or a general purpose script language that has a JSON library. Next, select(. ]+) in which I want the value of the fist match group. Thus you can access the values individually or echo the content of the entire array. In the end, for this challenge, I was able to extract the duration value as follows: Most modern applications use JSON and YAML for communication and configuration. I think i should use a regex but i don't know how to insert it in jq syntax. Can you salvage Nov 8, 2019 · I'm using bash script that needs to read the JSON output and parse a value from different JSON variables or strings. json response using shell script. That is why we have tools like jq and xmlstartlet . I would like to extract a value for a specified key so that e. declare -A name_of_dictonary_variable so that Bash understands it is a dictionary. In bash, we use. What would be a good way to do this? Oct 28, 2022 · The main problem seems to be in your json data because you have: {'a': 'apple', 'b', 'bananna'} As far as I know using single quotes is not valid (use double quotes): json format. Nov 21, 2017 · In any case, you can extract the . The following line will use jq to take each key:value of some JSON and export them as environment variables, properly escaping whitespace and special characters. – David C. Value' This will additionally decode any JSON encoding of the value, so that a value that is stored in JSON as \"The Admin\" <[email protected]> comes back as "The Admin" <[email protected]>. {"status":"14"} i want to get this status and check if it is less than 100; With a JSON string such as '{"lat":444, "lon":555}', json. Jun 28, 2018 · I have a string containing a list of key-value pairs like this: "a:1,b:2,c:3". Note that there are other alternatives to xmllint Oct 9, 2022 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Sep 4, 2019 · it's ideologically wrong to process JSON format with JSON-agnostic tools (like awk, sed, etc). Extract a value from a nested json key in bash. Jun 2, 2018 · But the right answer extract key and value, I would only value (to no manipulate string anymore) Thank you for your help. x and awk:. e. Etc etc. Sep 23, 2016 · But, as pointed out, you shouldn't use grep for this, but a tool that can parse JSON – for example jq: $ jq '. key'. Now I want to extract the value of the access token into an other var. Ask Question Asked 10 years, 1 month ago. example. Retrieving value from JSON object in bash using JQ. message}' > new. Jun 4, 2021 · Parsing json with awk/sed in bash to get key value pair. Unnecessary use of cat sometimes is nearly harmless (and honestly, this is one of those times), but getting into the habit will bite you hard when the command you're running is tail, shuf, or something else that's extremely inefficient when given a non-seekable FD. To select the item under the key 1, you'd do this:. I have a bash script that is trying to extract the value "myBucket" from this json file with the following command: jq '. Apr 4, 2019 · I have the following json array. You will likely need to pass the JSON value to a CLI for a script processor that can deserialize the JSON string and extract the data you are looking for. To get rid of the double quotes, you can use the -r ("raw output") option: $ jq -r '. Dec 4, 2023 · Parsing JSON in Bash can be achieved using tools like 'json. 0, etc. 3. ). Jan 1, 2020 · I am writing a bash script which has a json value stored in a variable now i want to extract the values in that json using Jq. However, there are many applications still using XML. We will use jq, a powerful command-line utility specifically designed for working with JSON data in Bash. Though I could extract the key-value pairs, I'm struggling to skip those entries that failed to Oct 22, 2023 · Extracting Specific Values from a JSON File in Bash. Extracting values from JSON using bash. Variable in sed parsing. awk -F ':[ \t]*' '/^. Feb 5, 2022 · extract data from nested JSON key/values. tags[] | . I need to extract value for key in linux. key | startswith(“name”)) filters the key-value pairs, and selects only those where the key starts with the string “name”. temperature,hum:. Let’s have a look at how we can parse JSON data using Bash. But if the object you want the keys from may also inherit enumerable properties from its prototype, you can restrict the loop to only the object's own keys (and not the keys of its prototype) by adding a hasOwnProperty call Feb 2, 2023 · I'm writing a bash script to read a JSON file and export the key-value pairs as environment variables. Oct 7, 2018 · I suspect the ding comes from the fact that parsing json or xml in bash is simply unwise, there is zero format validation. Such as, Lookup Content and be able to print Value1. (Linux) Extract JSON value using Grep specifically (no json parser) Jun 2, 2020 · once you install jq processor, try following command to extract the variable from JSON key value. humidity, id:. For example, to get the "text" field from tweets, something like: grep -Po '"text":. Neither are grep, tail, cut, etc. It is the only thing in the file. in loop is fine (unless someone has committed the sin of mucking about with Object. How to send with curl JSON from another curl command output. Extracting only some keys from a JSON file in Bash. Line 3: Extracts the value associated with the key "number" from the JSON data stored in the json variable. 0. How do I write JSON data to a file? Aug 10, 2016 · Using awk, if you just want to print it:. "VALUE". there i use curl command to call to api. Each object has a set of values, but the parameters for these values are all called the same names. . Jan 24, 2024 · In this example, the dictionary comprehension iterates over each customer record, using the customer_id as the key and the subscription_plan as the value in the new dictionary. ckfsm gdeokgc efh uapox zlaymp vmvo eacqjny dnij wqtp acyf uhv evnoyt dkjpy ckhdtjz wlcro