The directory where the keystore is …
cd /usr/java/jre/lib/security

To list keys currently in the keystore …
keytool -list -keystore cacerts

Assuming cert has been exported (via browser) to file mycert.x509 …
To import that key into the keystore:
Note: default password of the keystore is: changeit
keytool -import -noprompt -trustcacerts -alias www.yoursite.com -file mycert.x509 -keystore cacerts

Here is what is added to /usr/share/X11/xorg.conf.d/10-evdev.conf
Section "InputClass" Identifier "eGalaxy touchscreen" MatchVendor "eGalax" Option "SwapAxes" "on" Option "InvertX" "on" Option "InvertY" "off" Option "Calibration" "175 1900 121 1881" EndSection

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