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

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