How to modify a key's value in a JSON file from command line

Question

Is it possible to change the value of a key in a JSON file from command line?

e.g., in package.json:

Change

{
    .         


        

Answer 1

One way to achieve it is by using the "json" npm package, e.g.:

json -I -f package.json -e "this.name='adar'"

Another way is by using the jq CLI, e.g.:

mv package.json temp.json
jq -r '.name |= "adar"' temp.json > package.json
rm temp.json

Answer 2

The anoter way is to open the file itself in terminal :

pico filename.json

edit it then save then exit.

check if correct changes were made:

cat filename.json