First install wondershper before using any of the command mentioned below also, you need to be root.
1) Use ifconfig to determine which of your networkcards is connected to internet.
2) Time to shape the bandwidth--
Where interface name is your network interface name like eth0 or eth1 or wifi0 and down speed , up speed are specified in kilo bits per second.
So sample command will look like
# wondershaper eth0 128 64
3) To disable wondershaper from controlling particular interface use following command.
# wondershaper clear eth0
4) To make these changes permanent add following lines to network file
down /sbin/wondershaper clear