Package: gnome-system-monitor

"gnome-system-monitor" package binaries on CentOS:

/usr/bin/gnome-system-monitor

You may install this package on CentOS with yum install gnome-system-monitor

"gnome-system-monitor" package binaries on Debian:

/usr/bin/gnome-system-monitor

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