[gmx-users] regarding do_dssp

[RINU KHATTRI]

hello gromacs users
i am working on complex with popc membrane i am trying to run do_dssp
command but i got  the  error then i am trying to install dssp package
 by

 sudo wget ftp://ftp.cmbi.ru.nl/pub/software/dssp/dssp-2.0.4-linux-amd64
-O /usr/local/bin/dssp
--2014-11-21 11:17:57--
ftp://ftp.cmbi.ru.nl/pub/software/dssp/dssp-2.0.4-linux-amd64
           => `/usr/local/bin/dssp'
Resolving ftp.cmbi.ru.nl (ftp.cmbi.ru.nl)... failed: Name or service not known.
wget: unable to resolve host address `ftp.cmbi.ru.nl'

still i am getting the error( ftp.cmbi.ru.nl)... failed: Name or service no

how to install manually
thanks in advance