How to install SAGA-GIS

[phamtuanamd]

I'm installing SAGA-GIS from: http://sourceforge.net/scm/?type=cvs&group_id=102728, and i have seen the error message:
pht@PhamHuuTuan:~$ cvs -d:pserver:anonymous@saga-gis.cvs.sourceforge.net:/cvsroot/saga-gis login
Logging in to :pserver:anonymous@saga-gis.cvs.sourceforge.net:2401:/cvsroot/saga-gis
CVS Password:
cvs [login aborted]: authorization failed: server saga-gis.cvs.sourceforge.net rejected access to /cvsroot/saga-gis for user anonymous
How to use it?Sorry! My English is not good

[johanvdw]

A package for SAGA GIS is available here:
https://launchpad.net/~johanvdw/+archive/saga-gis

[earlycj5]

I've been using the ubuntugis-unstable ppa.
https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable