SSH authentication for NX
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Use RSA key pair.
key pair can be generated also using NX		https://www.nomachine.com/AR01C00126
SSH key file based authentication in NX   https://www.nomachine.com/AR02L00785

about generating key pair, please see http://enos.itcollege.ee/~edmund/materials/ssh.txt

copy key into appropriate file
cat ~/.ssh/keyfile.pub >> ~/.nx/config/authorized.crt

public key can be copied also from authorized keys file:

cat ~/.ssh/authorized_keys | grep name >> ~/.nx/config/authorized.crt
... replace "name" with appropriate name needed to filter out

Then you can configure SSH key file based authentication in NX client, using private key from appropriate key pair.


Disable NX notifications and system tray icon
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https://www.nomachine.com/AR02N00877
BaseDirectory/NX/etc directory on Linux
BaseDirectory/NoMachine/etc directory on Windows
BaseDirectory/NoMachine.app/Contents/Frameworks/etc/ directory on Mac

/usr/NX/etc/node.cfg		#file that has to be changed
DisplayMonitorNotifications 0		#disables system tray notifications
DisplayMonitorIcon 0		#disables system tray icon
sudo service nxserver restart		#restart the service, can be done also via GUI

Switching the view between multi-monitors during a remote desktop session
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https://www.nomachine.com/switching-the-view-between-multi-monitors-during-a-remote-desktop-session
selecting shortcut keys:
CTRL+ALT+1 first monitor
CTRL+ALT+2 second monitor
CTRL+ALT+A all monitors
CTRL+ALT+I identify the monitor