To list mounted devices, run the following command in a terminal:
The listing shows the device (such as a hard disk partition), the mount point (where you access the files), the filesystem type and the mount options.
This example shows the hda2 hard disk partition mounted as '/', with the filesystem type ext3. The partition is mounted with two options, one to allow the device to be read from and wrote to and the other to remount the device as read only in the event of any errors.
/dev/hda2 on / type ext3 (rw,errors=remount-ro)
To list PCI devices:
To list USB devices: