Need to remove NoMachine from Pop!_OS COSMIC computer

[doobs]

So,

I used the https://web9001.nomachine.com/download/9.1/Linux/nomachine_9.1.24_6_x86_64.tar.gz to install NoMachine on my newly instantiated Pop!_OS COSMIC BETA on a desktop computer.

Several things are inop:

1. I only have access to one of two monitors from client machines
2. NoMachine does not echo input from either a Linux or Windows client

looking through nxserver, there doesn’t seem to be an install for Pop!_OS COSMIC.

So, until there is more support, I want to remove NoMachine from this computer.

Trouble is, I have no idea how.

Can someone please weigh in here?

Thank you

chris

 

[Britgirl]

PopOS is based on Ubuntu, so it should not be that different. The only issue we are aware of is on the latest Ubuntu 25, virtual display sessions are not possible because Ubuntu has removed support for Xorg. See this article for reference: http://www.nomachine.com/AR10W01330.

I only have access to one of two monitors from client machines
NoMachine does not echo input from either a Linux or Windows client

Please explain exactly what you mean. Screenshots or images which show the problem would be useful.

For uninstall instructions, take a look at the installation guide: https://kb.nomachine.com/DT04U00269#2.7

sudo /opt/NX/scripts/setup/nxserver --uninstall

then, remove the installation directory:

sudo rm -rf /opt/NX

[doobs]

A screenshot of NoMachine not working? Dunno how to do that.

I managed to find nxserver, and no it wasn’t in /opt/NX, it was in /usr/NX/bin

The folder that I installed from was deleted after initial installation. Had no idea it would be needed it to uninstall.

So I got this:

chris@halfpint:/usr/NX/bin$ sudo ./nxserver --uninstall

nawk: cannot open "/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/etc/server.cfg"
 (No such file or directory)

NX> 595 ERROR: Initialization failed. Cannot open file: /mnt/library/Linux/NoMachine/
nomachine_9.1.24_6_x86_64/NX/etc/server.cfg

NX> 595 ERROR: No such file or directory. Please try to fix the problem by

NX> 595 ERROR: running /mnt/library/Linux/NoMachine/
nomachine_9.1.24_6_x86_64/NX/scripts/setup/nxserver --install

Looking through the newly unzipped files, I find server.cfg.sample and copy it over to “/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/etc/server.cfg” and edit it to reflect where (I think) the files are.

This is what server.cfg looks like now:

# Specify the path of base directory where the NX software has been

# installed.

#

ServerRoot = “/usr/NX/bin”

#

# Specify the path of the home directory of the nx user on Windows.

#

NXUserHome = “/var/NX/nx/.nx”

Now I get:

chris@halfpint:/usr/NX/bin$ sudo ./nxserver --uninstall

NX> 630 ERROR: No subscription found on this server.

NX> 630 ERROR: Please contact NoMachine to acquire a valid subscription.

So, I’m going to ask again:

How do I remove NoMachine from this computer?

Thank you

[Britgirl]

Sorry I pasted the command to use for non-default locations. Here are the commands, again, from the guide I previously linked.

UNINSTALL

sudo /usr/NX/scripts/setup/nxserver --uninstall

then, remove the installation directory:

sudo rm -rf /usr/NX

[doobs]

Third time :

sudo /usr/NX/scripts/setup/nxserver –-uninstall

NX> 704 ERROR: Unknown action '–-uninstall'.

Usage: nxserver ACTION

Actions:

--install        {SYSTEM}   Run the NoMachine server install procedure for the

specified system or distribution

--update         {SYSTEM}   Run the NoMachine server update procedure for the

specified system or distribution

--uninstall                 Run the NoMachine server uninstall procedure.

--pre-uninstall             Disable access to new NX sessions, terminate

sessions and reset the session DBs.

--keygen                    Generate a new pair of SSH keys for the NoMachine

login. After running this procedure, clients will use the key: /usr/NX/share/keys/default.id_dsa.key
to connect to this NX server.

--keyrestore                Restore the SSH key provided with the server package. Current key will be moved to default.id_dsa.key.backup file.

--help                      Show this message

The specified SYSTEM must be one of the following operating systems.

If not the NoMachine setup will try to autodetect the system or will choose

the layout that better resembles one of the known OS.

 

redhat       Red Hat Enterprise 4 and later.

suse         SLED 10 and later, SLES 10 and later, Open SUSE 10 and later.

slackware

mandriva     Mandriva 2009 and later.

debian       Debian 4.0 and later.

Ubuntu 8.04 and later.

fedora       Fedora 10 and later.

If it’s any help, I tried this:
sudo /usr/NX/scripts/setup/nxserver --update

NX> 704 NoMachine Server package is already installed in: /mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX.
So, once more with feeling:

How do I remove NoMachine from this computer?

[Britgirl]

I am pasting what you have written above

sudo /usr/NX/scripts/setup/nxserver –-uninstall

and now I’m pasting what the command is in our guide

sudo /usr/NX/scripts/setup/nxserver --uninstall

I see a slight difference in the ‘-‘ you are using. I don’t know if that is an error in the paste and how it shows in our forum or if you copied from your terminal. But please check this. If you don’t use the right command, the output you show is expected.

[doobs]

Copied and pasted EXACTLY as shown above:
sudo /usr/NX/scripts/setup/nxserver --uninstall

NX> 704 Standalone NoMachine Server package is installed in another directory.
Why is this so hard?

[fisherman]

Based on this discussion and the info you shared, it looks like NoMachine is installed in two different locations: /usr/NX and /mnt/....

From the command output you posted:

sudo /usr/NX/scripts/setup/nxserver --update
NX> 704 NoMachine Server package is already installed in:
/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX.

We can see that there’s also an installation under
/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/.
It also seems that this folder no longer exists or that the /mnt drive is detached, which explains the error message:
nawk: cannot open “/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/etc/server.cfg”

As a workaround, you can try copying the files from /usr/NX/ to /mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/, and then run:
/mnt/library/Linux/NoMachine/nomachine_9.1.24_6_x86_64/NX/scripts/setup/nxserver --uninstall

This should let you properly uninstall the leftover NoMachine installation.

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