* issuer: CN=COMODO ECC Domain Validation Secure Server CA 2,O=COMODO CA Limited,L=Salford,ST=Greater Manchester,C=GB

* subject: CN=,OU=PositiveSSL Multi-Domain,OU=Domain Control Validated * SSL connection using TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 * CAfile: /etc/pki/tls/certs/ca-bundle.crt * Initializing NSS with certpath: sql:/etc/pki/nssdb If you are having issues and would like to validate, you are getting the expected request and response header. % Total % Received % Xferd Average Speed Time Time Time Currentġ00 18557 0 18557 0 0 72565 0 -:-:-:-:-:-:- 72772Ībove example will save all the contents from gf.dev to /tmp/gf.html Show request and response header If you have to save the URL or URI contents to a specific file, you can use the following syntax curl > yoururl.htmlĮx: tmp]# curl > /tmp/gfhtml tmp]# curl Ĭurl: (6) Could not resolve host: Unknown error However, if the server can’t connect, then you will get errors such as could not resolve the host. If you are working on a UNIX system and trying to connect the external URL, the first thing you wish to do is to check if you can access the URL through curl. The following are some of the most used syntaxes with an example to help you. cURL is a cross-platform utility means you can use on Windows, MAC, and UNIX. If you are working as a developer or in the support function, you must be aware of cURL command usage to troubleshoot web applications. CURL is a command-line tool to get or send data using URL syntax.

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