synclient(1) on Linux
The text a6a9b41b476a, as Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it.
query and modify Synaptics TouchPad driver for XOrg/XFree86 server parameters on the fly.
Flags it lists
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-? -
-V -
-h -
-l -
-m