==== ~/bin/setfanspeed ====
#!/bin/bash
sudo rmmod thinkpad_acpi
sleep 3
sudo modprobe thinkpad_acpi fan_control=1
echo "level $1" | sudo tee /proc/acpi/ibm/fan

==== Output when run on 14.04 ====
myuser@mylaptop:~$ setfanspeed 7
rmmod: ERROR: Module thinkpad_acpi is in use
level 7
tee: /proc/acpi/ibm/fan: Invalid argument