Auto Mount USB Drives in Raspbian

Update and upgrade the Raspbian installation.

sudo apt-get update && sudo apt-get upgrade

Install the package necessary to automatically mount USB drives.

sudo apt-get install usbmount

Now plug a USB drive and issue the df command to view all volumes. My USB drive was recognized /dev/sdb and mounted as /media/usb0 by the system.

df -hT
pi@raspberrypi ~ $ df -hT
Filesystem     Type      Size  Used Avail Use% Mounted on
rootfs         rootfs    2.9G  2.6G  215M  93% /
/dev/root      ext4      2.9G  2.6G  215M  93% /
devtmpfs       devtmpfs  460M     0  460M   0% /dev
tmpfs          tmpfs      93M  256K   93M   1% /run
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs     186M     0  186M   0% /run/shm
/dev/mmcblk0p1 vfat       56M   15M   42M  26% /boot
/dev/sdb1      vfat      2.0G  200M  1.8G  11% /media/usb0

To un-mount a volume make use of the df command above to discover the USB drive mount point and issue the unmount command as follows.

sudo umount /media/usb0