Cannot install latest version ( on Ubuntu 16.04

Forum / NoMachine for Linux / Cannot install latest version ( on Ubuntu 16.04

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    My remote server crashed and NoMachine logged me out. Reset server, but I couldn’t log back in and saw an error that it wasn’t able to create a display. I couldn’t find a solution, so I uninstalled using  “sudo dpkg- r nomachine” and  ” sudo rm -rf /usr/NX.” As far as I know, there shouldn’t be any left over files. I can login using ssh and other software just fine.

    The new installation is failing regardless if I install using root or a sudo user. Server is updated and I’ve download both the deb and tar files to /tmp, as well as /usr. I know the tar works differently. Same issue crops up. The installation isn’t setting the correct rights for a few files, namely the config and ssh files. I see a variety of owner/group permissions view the folder in /usrNX, but I have no idea what the correct settings should be. I attached the log. Listed below is the putty output.

    I’d appreciate any help resolving this issue, thanks.


    Unfortunately we will need some additional information. Those should tell us where the real problem is. Please collect /usr/NX/var/log/nxinstall.log and /usr/NX/var/log/nxupdate.log (if it exist) files. Output from commands ls -ltr /usr/NX/etc/ and uname -a will be very useful. Send those information to forum[at]nomachine[dot]com, please.


    I just an email with the requested information. Let me know if you need anything else. Thanks.


    We have been unable to reproduce this problem. From logs you sent to us we have some conflicting information. One log says there are all files and have proper permissions set. Another log says that installation can’t find those files. Logs appear to be from two different machines, e.g one set from the connecting client, the other from the server. Also we did not received /usr/NX/var/log/nxinstall.log and /usr/NX/var/log/nxupdate.log which are essential to reproduce the problem in our lab.

    You can also create detailed debug file which should tell us everything about the problem. You can do it by executing command sudo sed -i '20s/^/set -x\n/' /usr/NX/scripts/setup/nxnode && sudo /usr/NX/scripts/setup/nxserver --update > nxlog.txt 2>&1 && sudo sed -i "/set -x/d" /usr/NX/scripts/setup/nxnode from your terminal and then send us nxlog.txt which will be in the place you executed command above.

    Please note that the logs must be from the machine where you are having installation problems.



    The problem is related to ‘install’ command.
    Probably the standard command was replaced by a link/wrapper to apt.
    Could you run:

    /bin/install --help

    It should looks like this:

    $ install --help
    Usage: install [OPTION]... [-T] SOURCE DEST
    or:  install [OPTION]... SOURCE... DIRECTORY
    or:  install [OPTION]... -t DIRECTORY SOURCE...
    or:  install [OPTION]... -d DIRECTORY...
    This install program copies files (often just compiled) into
    destination locations you choose........

    The default location of original ‘install’ program in Ubuntu 16.04 is:



    I have no idea what’s going on with this program. I haven’t had any issues installing other programs using root or a sudo user. I vaguely recall trying to install it once using 4.3 Tar instructions, but I deleted everything when that approach produced the same errors.

    I followed the DEB instructions per this page.

    Running the aforementioned command showed the following.

    root@ ~ # /bin/install –help

    Reading package lists… Done

    Building dependency tree

    Reading state information… Done

    0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

    It’s my understand that the default paths should already be taken care of by the standard “dpkg -i <filenamehere>” command. Did you get the files I sent after running the command Hawk mentioned?

    What I’m seeing in the log files DOES contradict the command prompt output, which I why I sent both. They should match up, ya know lol. It’s not 2 different machines. Something is wrong with the install script for my server.

    I’m to open any ideas. If you need anything please let me know.





    As you can see your install command is replaced by some script that is trying to use apt. install is a basic command used on all linux distributions for copying files and should not be replaced. To fix this issue you need to check if install command is not replaced by alias (alias | grep install and if it’s on the list unalias install). If it’s not replaced by alias please change name of /bin/install file and try to install NoMachine again.

    Output from install --help command should look like this:

    install --help
    Usage: ./install [OPTION]... [-T] SOURCE DEST
      or:  ./install [OPTION]... SOURCE... DIRECTORY
      or:  ./install [OPTION]... -t DIRECTORY SOURCE...
      or:  ./install [OPTION]... -d DIRECTORY...
    This install program copies files (often just compiled) into destination
    locations you choose.  If you want to download and install a ready-to-use
    package on a GNU/Linux system, you should instead be using a package manager
    like yum(1) or apt-get(1).
    In the first three forms, copy SOURCE to DEST or multiple SOURCE(s) to
    the existing DIRECTORY, while setting permission modes and owner/group.
    In the 4th form, create all components of the given DIRECTORY(ies).
    Mandatory arguments to long options are mandatory for short options too.
          --backup[=CONTROL]  make a backup of each existing destination file
      -b                  like --backup but does not accept an argument
      -c                  (ignored)
      -C, --compare       compare each pair of source and destination files, and
                            in some cases, do not modify the destination at all
      -d, --directory     treat all arguments as directory names; create all
                            components of the specified directories
      -D                  create all leading components of DEST except the last,
                            or all components of --target-directory,
                            then copy SOURCE to DEST
      -g, --group=GROUP   set group ownership, instead of process' current group
      -m, --mode=MODE     set permission mode (as in chmod), instead of rwxr-xr-x
      -o, --owner=OWNER   set ownership (super-user only)
      -p, --preserve-timestamps   apply access/modification times of SOURCE files
                            to corresponding destination files
      -s, --strip         strip symbol tables
          --strip-program=PROGRAM  program used to strip binaries
      -S, --suffix=SUFFIX  override the usual backup suffix
      -t, --target-directory=DIRECTORY  copy all SOURCE arguments into DIRECTORY
      -T, --no-target-directory  treat DEST as a normal file
      -v, --verbose       print the name of each directory as it is created
          --preserve-context  preserve SELinux security context
      -Z                      set SELinux security context of destination
                                file to default type
          --context[=CTX]     like -Z, or if CTX is specified then set the
                                SELinux or SMACK security context to CTX
          --help     display this help and exit
          --version  output version information and exit
    The backup suffix is '~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.
    The version control method may be selected via the --backup option or through
    the VERSION_CONTROL environment variable.  Here are the values:
      none, off       never make backups (even if --backup is given)
      numbered, t     make numbered backups
      existing, nil   numbered if numbered backups exist, simple otherwise
      simple, never   always make simple backups
    GNU coreutils online help: <>
    Full documentation at: <>
    or available locally via: info '(coreutils) install invocation'

    There is no output when running alias | grep install

    Inside bin/install file is “sudo apt install”  I held back updating a few programs awhile ago, which shouldn’t have anything to do with NoMachine.

    What should I change the filename to ?


    NoMachine setup is using command install for copying and setting files. As install is replaced on your machine files are installing incorrectly. Please rename /bin/install to for example /bin/inst (by command mv /bin/install /bin/inst) and try to install NoMachine again.


    The installation was a success after making the directory change.

    However, trying to access the remote server is not working. Error message I see is, “authentication failed, please try again.” I know the password is correct.

    Any ideas?


    I was able to reproduce the issue and unfortunately previous problem caused installation damage and it is hard to fix without reinstalling NoMachine.

    To completely reinstall NoMachine you need to use command sudo dpkg --purge nomachine then remove leftover catalog by command rm -rf /usr/NX/ and install it again. This should fix the problem with authentication.


    Installation went very well, but now I’m seeing an error message, ”

    Error: Cannot create a new display, please contact your system administrator.” I’m using XFCE4 and haven’t changed it. Something I need to fix on the config file?

    Error: Cannot create a new display, please contact your system administrator’.

    6680 236 20:11:37 628.742 ClientSession: Stopping session at 0x02d4d7f0.

    6680 236 20:11:37 640.710 Connection: Stopping connection at 0x03bf1c50.

    Info: Slave server running with pid 948.

    6680 236 20:11:37 640.710 ClientDaemonConnector: Stopping the current connection.

    Info: Listening to slave connections on port 35040.

    6680 236 20:11:37 641.710 Connection: Stopped connection at 0x03bf1c50.

    6680 236 20:11:37 652.731 ClientSession: Stopped session at 0x02d4d7f0.

    6680 236 20:11:37 652.731 Connection: Stop reading because of parser request.


    We will need your node.cfg file so we can verify if file is complete. You can find it at /usr/NX/etc/node.cfg, then send those information to forum[at]nomachine[dot]com, please.

    Also please verify if your default desktop command is set properly. First check what is the path to startxfce4 by using command which startxfce4 and then navigate to /usr/NX/etc/node.cfg and check if DefaultDesktopCommand key is set to path you got from which command. It should look similar to this:
    DefaultDesktopCommand "/usr/bin/startxfce4"

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