Filtering

{"username":"jdoe","password":"sec\\ret$"} EOF $ jq . ./credentials.json { "username": "jdoe", "password": "sec\\ret$" } \```

Filtering#

jq is the program to manipulate JSON in Bash. The most common use is to pull some information out of JSON files. It uses a filter language to manipulate the input. The simplest filter is the identity, . (a single full stop). This is similar to mathematical identity: the input becomes the output. Let’s create a file containing some non–trivial JSON and apply the identity filter to it:

The first command uses a quoted here document to save a string with special characters without having to escape them.

 

This page is a preview of The newline Guide to Bash Scripting

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