curl check response code code example

Example 1: curl return code only

curl -s -o /dev/null -w "%{http_code}" http://www.example.org/

Example 2: get status code of curl

curl -o /dev/null -s -w "%{http_code}\n" http://localhost

Example 3: curl check response headers

Just use '-ISs' flag options I:(only headers), sS:(silence and no errors) 
curl www.example -ISs

Example 4: curl get return code

curl -I http://www.example.org