Welcome to LQ. .. ..
: A Java based PDF merge and split tool.
Pdfsam-2.2.1-out-src : Better the enhanced version pdfsam-2.2.1e,
and preferable as en rpm package : Difficult to build from source ?
The package pdfsam-2.2.1e-2.noarch.rpm can be downloaded here
It is a "Suse 11.4 Factory" package, repacked to use the older el5 'rpm' :
# rpm -Uvh pdfsam-2.2.1e-2.noarch.rpm
EDIT: A launcher was added to the package. (The start command is 'pdfsam'.)
Good luck !