or download this
“The libssh2 library is required by this module. If you don't have it
+, you can download it from http://www.libssh2.org; you may also need
+OpenSSL, which can be obtained from http://www.openssl.org.
Debian: sudo aptitude install libssh2-1-dev
OpenSUSE: sudo zypper in libssh2-1 libssh2-devel
Can't link/include ‘libssh2.h’, 'ssh2'