curl --cacert ./publick_form_firefox.crt --silent --head https://www.domain.hu | head -n1 | cut -d " " -f2
# HTTP/1.1 200 OK
# Date: Thu, 30 Jan 2014 09:33:49 GMT
# Server: Apache
# Last-Modified: Wed, 31 Oct 2012 14:44:20 GMT
# ETag: "3e4050-af5-4cd5bf00dd900"
# Accept-Ranges: bytes
# Content-Length: 2805
# Content-Type: text/html

curl --cacert ./publick_form_firefox.crt -I https://www.domain.hu | head -n1 | cut -d " " -f2

# HTTP/1.1 200 OK
# Date: Thu, 30 Jan 2014 09:33:49 GMT
# Server: Apache
# Last-Modified: Wed, 31 Oct 2012 14:44:20 GMT
# ETag: "3e4050-af5-4cd5bf00dd900"
# Accept-Ranges: bytes
# Content-Length: 2805
# Content-Type: text/html

# Speed test
curl -o /dev/null -s -w %{time_connect}:%{time_starttransfer}:%{time_total} http://www.domain.hu



curl http://www.centos.org > centos-org.html


curl -u username:password URL
curl -u ftpuser:ftppass -O ftp://ftp_server/public_html/xss.php
curl -u username: --key ~/.ssh/id_rsa --pubkey ~/.ssh/id_rsa.pub scp://www.domain.com/~/rhn_register.ogv

curl -O -u username:password ftp://www.domain.com/file.iso

http://unitstep.net/blog/2009/05/05/using-curl-in-php-to-access-https-ssltls-protected-sites/

http://www.cyberciti.biz/faq/curl-download-file-example-under-linux-unix/