cURL

Flag	Description	Example
-o	Stores output; name should be given	-o page.html
-O	Stores output; name is the one used by webserver	-
-s	Silent; no status showed	-
-k	Skip SSL certificate check while using HTTPS	-
-I	only response headers	-
-i	both response headers and body	-
-L	follow redirects	-
-A	User agent	-A 'Mozilla/5.0'
-u	Username and password for login forms	-u admin:password
-H	Headers in the request	-H ‘Authorization: Basic somebase64string’
-X	Method	-X POST GET by default
-d	Data to be sent	-d ‘username=admin@password=admin’
-b	Cookie	-b ‘sessionid=somevalue’
-T	Uploads files to server, same as HTTP PUT	-T [filename.txt] [http://target/upload]

Common headers:

Content-Type:
Cookie:
Authorization:

Authentication:

Instead of adding username and password using -u flag:
curl username:password@{MACHINE_IP]

Cookies:

Cookies can also be mentioned in the header:
Eg: cookie is sessionid=somevalue
curl -b 'sessionid=somevalue' http://MACHINE_IP:port or
curl -H ‘Cookie: sessionid=somevalue’ http://MACHINE_IP:port

Note: In WINDOWS: only double quotes must be used and quotes inside data must be escaped: "

Content types:

json: application/json
form: application/x-www-form-urlencoded