Using Environment Variables in cURL Command - Unix

Question

My question is very simple. I want to use environment variables in a cURL command sth similar to this:

curl -k -X POST -H \'Content-Type: application/json\' -d \         


        

Answer 1

Single quotes inhibit variable substitution, so use double quotes. The inner double quotes must then be escaped.

...  -d "{\"username\":\"$USERNAME\",\"password\":\"$PASSWORD\"}"