Hi.
Username and password required by the NoMachine is your usual account credentials from your remote machine. For example you can check which user is logged to that machine using command whoami
.
If you don’t want to use your account credentials, you can also use NoMachine database. To enable it change values in server configuration file (it’s placed in /usr/NX/etc/server.cfg on remote machine) and uncomment two lines:
EnableUserDB 1
EnablePassDB 1
Then you can add your nomachine users by using command
sudo /usr/NX/bin/nxserver –useradd <enter_here_new_username>
Details you can find there: https://www.nomachine.com/DT12I00014