Package: gnome-screensaver

/usr/bin/gnome-screensaver /usr/bin/gnome-screensaver-command /usr/bin/gnome-screensaver-preferences

You may install this package on CentOS with yum install gnome-screensaver

/usr/bin/gnome-screensaver-command /usr/bin/gnome-screensaver

You may install this package on Debian with apt-get install gnome-screensaver