Error on Nmap 6.47

["Mr. Doel" <doel () mc-crew or id>]

I install Nmap 6.47 on my Ubuntu Desktop 14.04, when i try command "nmap
--script-updatedb" i got error like this :

root@mrrwx:~# nmap --script-updatedb

Starting Nmap 6.47 ( http://nmap.org ) at 2014-08-29 08:09 WIB
NSE: Updating rule database.
NSE: Failed to load
/usr/local/bin/../share/nmap/scripts//ssh-auth-methods.nse:
/usr/local/bin/../share/nmap/scripts//ssh-auth-methods.nse:3: module
'libssh2' not found:
NSE failed to find nselib/libssh2.lua in search paths.
no field package.preload['libssh2']
no file '/usr/local/share/lua/5.2/libssh2.lua'
no file '/usr/local/share/lua/5.2/libssh2/init.lua'
no file '/usr/local/lib/lua/5.2/libssh2.lua'
no file '/usr/local/lib/lua/5.2/libssh2/init.lua'
no file './libssh2.lua'
no file '/usr/local/lib/lua/5.2/libssh2.so'
no file '/usr/local/lib/lua/5.2/loadall.so'
no file './libssh2.so'
stack traceback:
[C]: in function 'require'
/usr/local/bin/../share/nmap/scripts//ssh-auth-methods.nse:3: in function
</usr/local/bin/../share/nmap/scripts//ssh-auth-methods.nse:1>
NSE: failed to initialize the script engine:
/usr/local/bin/../share/nmap/nse_main.lua:552: could not load script
stack traceback:
[C]: in function 'error'
/usr/local/bin/../share/nmap/nse_main.lua:552: in function 'new'
/usr/local/bin/../share/nmap/nse_main.lua:1260: in main chunk
[C]: in ?

QUITTING!
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