/usr/bin/pdf180
/usr/bin/pdf270
/usr/bin/pdf90
/usr/bin/pdfbook
/usr/bin/pdfflip
/usr/bin/pdfjam
/usr/bin/pdfjam-pocketmod
/usr/bin/pdfjam-slides3up
/usr/bin/pdfjam-slides6up
/usr/bin/pdfjoin
/usr/bin/pdfnup
/usr/bin/pdfpun
You may install this package on CentOS with
yum
install pdfjam