or download this
curl --version
curl 7.21.0 (i486-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2
+.3.4 libidn/1.15 libssh2/1.2.6 x
Protocols: dict file ftp ftps http https imap imaps ldap ldaps pop3 po
+p3s rtsp scp sftp smtp smtps telnet tftp
Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz