To ignore any ssl certificate warnings with curl, use the tack k option.
Here is an example:
$ curl -k https://examplewithbadsslcert.com
$ curl -I -k https://examplewithbadsslcert.com HTTP/1.1 200 OK Date: Tue, 14 Feb 2012 20:00:03 GMT Server: Apache Strict-Transport-Security: max-age=43200; includeSubDomains X-Frame-Options: SAMEORIGIN Set-Cookie: bb2_screener_=1329249603+188.8.131.52; path=/ Set-Cookie: PHPSESSID=lq5dpvfagbdstib7nlg2b8a0m7; path=/ X-Hello: Hello There Vary: Accept-Encoding Content-Type: text/html; charset=UTF-8
Without tack k, you’ll get various SSL certificate problem errors such as:
$ curl -I https://examplewithbadsslcert.com curl: (60) SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed More details here: http://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option.