In some cases, mainly dependent on system configuration, after having updated NoMachine Terminal Server to version 6, the server log file fills up rapidly with warning messages like:

2017-12-01 08:04:37 791.607 144754 NXSERVER WARNING! Process ‘/usr/NX/bin/nxexec /usr/NX/scripts/restricted/nxenvironmentget.sh mate-session mate-session’ with pid ‘5111/5111’ finished with exit code 1 after 0,014 seconds.
2017-12-01 08:04:37 791.829 144754 NXSERVER WARNING! __getProcessEnvironment /usr/NX/scripts/restricted/nxenvironmentget.sh finished with 1

This does not impact the software’s functionalities.

As a workaround, it’s suggested to set the server log level to 3 (Error condition):

1) Edit /usr/NX/etc/server.cfg, uncomment and set the following key:

  SessionLogLevel 3

Otherwise, it’s possible to remove support for physical desktop access (which is already limited to special user like administrators and NoMachine trusted users):

1) Edit /usr/NX/etc/server.cfg file and remove ‘physical-desktop’ from the AvailableSessionTypes key.

2) Then restart NoMachine (this will terminate all running sessions):

  sudo /etc/NX/nxserver –restart 

參考連結：