On a Lenovo Thinkpad the trackpad is the red button that acts as a mouse. To set the sensistivity and speed of your trackpad on for ubuntu/debian linux do (as root):
echo -n 180 > /sys/devices/platform/i8042/serio1/speed
echo -n 250 > /sys/devices/platform/i8042/serio1/sensitivity
To have these applied every time you user the computer (probably what you want!) just add those two lines to /etc/rc.local before the final exit 0 so results looks like:
echo -n 180 > /sys/devices/platform/i8042/serio1/speed
echo -n 250 > /sys/devices/platform/i8042/serio1/sensitivityexit 0
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Thank you for your work on the public domain. I found some things I am going to have my students read.