Disable touchpad

Command line, type xinput, view the touchpad device ID, such as mine:

⎡ Virtual core pointer                      id=2    [master pointer  (3)]
⎜↳ Virtual core XTEST pointer               id=4    [slave  pointer  (2)]
⎜↳ Cypress APA Trackpad (cyapa)             id=14 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ Sleep Button id=10 [slave keyboard (3)] ↳ Integrated_Webcam_HD id=13 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=15 [slave keyboard (3)]

ID is the touchpad can be seen 14, then the next command execution

xinput disable 14

You can disable the touchpad. To restore the touchpad, execute the command

xinput enable 14