Quote Originally Posted by garyng
To just have a look at what is available in the system, there is the KDE Info Center. But it is in no way as comprehensive as Windows like installing new driver, rollback driver etc.
Comprehensive? I certainly wouldn't have used that word- I think cute and fuzzy but mostly useless is a better descriptor of the hardware manager.

Anyway...to the actual question. There are all sorts of different ways to see info about hardware- each Linux desktop environment has its own. But they all (more or less) are just frontends for an actual command. But rather than compare apples to oranges I will actually answer your question.

The following will work on ANY Linux system- irregardless of the particular distro and desktop environment you are using.

lspci -v
cat /proc/pci
cat /proc/interrupts
cat /proc/bus/usb/devicecs
cat /proc/scsi/scsi
cat /proc/cpuinfo
procinfo -f
free
X -version
df -haT

Specifically- for USB there is an app called 'usbview'. Just enter usbview in a terminal.