Unable to change server settings on Ubuntu

[Maverick]

Installed NoMachine Version 6.5.6 on Ubuntu 18.04.2 LTS.

Added username as administrator
$ sudo /usr/NX/bin/nxserver –userlist –administrator
NX> 149 NX administrators list
——————————–
<my-user-name>

When I attempt to change server settings by clicking “Changes disabled” I get a popup “Please insert user with administrative rights”. Providing <my-user-name> results in “Authentication failed, please try again” message.

What am I missing?

Thanks for all help.

[graywolf]

Is the user enabled to run sudo?

[Maverick]

Yes.

[graywolf]

Check the output of command sudo -l.
Search system log for message from “nx” sources: journalctl -b -0 | grep n.
Look at NoMachine log in /usr/NX/var/log/node/C-*/session and /usr/NX/var/log/nxerror.log.

[Author]

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