Eizo ColorNavigator 6 and ColorNavigator NX are available for Linux but only for Red Hat Enterprise Linux/CentOS 6. Eizo mention Linux here and there on their website but they do not provide direct download link anywhere. Eizo support however gave me proper download link without any questions.
Provided package is not 'ad-hoc' but proper installation script which does all it needs to install ColorNavigator. The ColorNavigator itself works perfectly fine after installation on CentOS 6.8 x86_64 on bare metal and VirtualBox. I was able to calibrate Eizo monitor completely with X-Rite iDisplay Pro.
I do not know if Eizo gives any support.
I tried to launch CN6 on Ubuntu 16.04 x64_84 but it fails because CN6 is 32bit app and there are unresolved differences between RH and Ubuntu libraries.
I like the CN6 very much . The calibration is very easy and quick.
Hopefully Eizo will consider update/rebuild CN6 to extend their Linux support.