Finding available disks:
fdisk -l
Mounting partitions: Devices are found in /dev and are often mounted into 'mount points' in the /mnt directory using the mount command:
mount -t <type of filesystem> <device> <mount point>
e.g.
mount /dev/hda1 /mnt/hda1 mount -t ntfs /dev/hdb1 /mnt/hdb1 mount -t smb -o username=someuser,password=somepassword //192.168.0.13/path /mnt/something
smb mounts are windows network mounts
df - displays disk information
du - show disk use of a directory. du -s recurses though subdirectories
du -s -k * | sort -n