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jq:tldr:52adf

jq: Print all array items/object keys.
$ ${cat filename-json} | jq '.[]'
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This command is used to read the content of a JSON file and parse it using the jq command line tool, which is commonly used for manipulating JSON data.

Here is the breakdown of the command:

  1. ${cat filename-json}: This part uses the cat command to fetch the content of the file named filename-json.

    • cat is a command that concatenates and displays the content of files.
    • ${} is a syntax used to embed a command within another command. In this case, it executes the cat filename-json command and provides its output as input to the next command in the pipeline.
  2. |: This is a pipe symbol used to redirect the output of the previous command to the input of the next command.

    • In this case, it passes the output of cat filename-json to the next command, jq.
  3. jq '.[]': This command takes the JSON input and applies the '.[]' filter using jq.

    • jq is a powerful command-line JSON processor that can be used to extract, transform, and manipulate JSON data.
    • .[] is a filter in jq that selects all the elements in an array or all the values in an object.
    • By applying this filter, jq will extract all the elements or values from the JSON data received as input.

In summary, the command reads the content of a JSON file and then uses jq to extract all the elements or values from that JSON data.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.
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