Here is a quick way to mount a USB thumb drive in Linux. Most distros will recognize the USB stick when you plug it in, but it case they don't then this command comes in handy:
sudo mount -t vfat /dev/sdf1 /mnt/cruzer/
Now you can access and browse the contents of the usb stick by change the
current directory to
/mnt/cruzer/. Your mileage may vary and your Linux distro
may have a different file system hierarchy.