Curl

1. Fetch HTTP Headers : curl --head "https://example.com"

2. List contents of directory : curl --list-only "https://example.com/foo/"

3. Redirect query as specified by a 3xx response : curl --location "https://iana.org"

4. Check whether a site is down : curl --head --show-error "http://example.com"

5. Send form data : curl --form "username=seth" --form "password=12345678" "https://example.com/api/v4/endpoint"

6. Send a file as form data : curl --form "profile=@me.jpg" "https://example.com/foo/bar"

7. Send contents of a file as form data : curl --form "description=<file.md" "https://example.com/foo/bar"

8. Specify HTTP Method : curl --request POST --data "Foo: bar" "https://example.com/api/endpoint"

9. Curl post request :curl -d "name=username&password=123456"

10. -s option doesnt show any error msg : curl -s URL

11. curl -s -d "username=test&password=xyz&submit=submit" -X POST http://ip/login/

12. curl -s --cookie "zyx=1" http://ip/

13. curl -s --user-agent "Mozilla/5.0 (iPhone; CPU iPhone OS 13_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.1 Mobile/15E148 Safari/604.1" http://10.10.141.149/

14. curl -s --referer "tryhackme.com" http://zyx/free_sub/

15. -H flag : sends additional preflight request headers to the server : curl -s -H "egg: Yes" http://ip/