Start Synergy BEFORE logging in

For 16.04 create the following file (it doesn’t exist)

/etc/lightdm/lightdm.conf

with the contents:

[Seat:*]
autologin-user=

[SeatDefaults]
greeter-setup-script=/usr/bin/synergyc <hostname>

Ref: https://askubuntu.com/questions/918137/start-synergy-or-any-application-before-logging-in-ubuntu-16-04-2-lts

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