Ride

Riding... a very respected skill among the nobles but also known 
and practiced by many commoners and other people. Mounts offer 
many bonuses to their riders but there are also many disadvantages 
while riding or owning a mount. Basic things necessary for riding 
are: A mount and a rope. The mount is quite obvious why you need 
it. Rope is needed to tie your mount to something while you are 
away from it or else it might run away and never be seen again.
Commands:
  Ride <mount>                 - To ride on a mount.
  Ride dismount                - To get down from mount's back.
  Ride ascend                  - To take your mount to the skies.
  Ride ascend with <target>    - To fly with another person.
  Ride special at <target>     - Special for some mount types.

See also these helps:
  'riding', 'riding long' and 'mount feats'