Cannot login to Ubuntu NX server – could not retrieve NX scripts directory

[higrys]

The latest version of NoMachine Server (Free edition – 5.2.21) stopped running on Ubuntu 14.04. I used to use it for a long time but after the update I cannot login any more to the NX server running on my Ubuntu laptop. After a bit of digging, the problem boils down to nxexec command always failing with “Could not retrieve NX scripts directory” error. In log files any command issued via nxexec fails with the same error.

Same if I try to run it manually:

🕠  [root@Lothlorien:/home/usr/NX/var/log] # /usr/NX/bin/nxexec nxfwget.sh iptables INPUT
Error: Could not retrieve NX scripts directory.

Stracing the problem does not bring any more info:

readlink(“/proc/17754/exe”, “/home/usr/NX/bin/nxexec”, 256) = 23
lstat(“/etc/NX/server/localhost/client.cfg”, {st_mode=S_IFREG|0644, st_size=607, …}) = 0
open(“/etc/NX/server/localhost/client.cfg”, O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=607, …}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fada4771000
read(3, “################################”…, 4096) = 607
read(3, “”, 4096)                       = 0
close(3)                                = 0
munmap(0x7fada4771000, 4096)            = 0
lstat(“/etc/NX/node/localhost/client.cfg”, 0x7ffece9421c0) = -1 ENOENT (No such file or directory)
lstat(“/etc/NX/player/localhost/client.cfg”, 0x7ffece9421c0) = -1 ENOENT (No such file or directory)
write(2, “Error: Could not retrieve NX scr”…, 48Error: Could not retrieve NX scripts directory.

I tried to add the last files which were missing also providing the configuration files as they (I think) should be. Tried all the combinations.

I remove NoMachine completely (including manually removing all the /usr/NX/ /etc/NX etc. directories after uninstalling with dpkg. Clean install produces exactly the same errors. I reinstalled it using dpkg, later repeated it with .tar.gz. All the same. I always used standard directory structure.

[zaq]

Hello higrys

We couldn’t reproduce the problem in our laboratory. Could you
reinstall NoMachine again and reproduce problem?

1. Uninstall NoMachine:

sudo dpkg -P nomachine

2. Remove all directories:

sudo rm -rf /usr/NX /etc/NX /var/NX

3. Check architecture of your OS:

uname -a

If the output include: x86_64 x86_64 x86_64 GNU/Linux
you should use x64 package:

nomachine_5.2.21_1_amd64.deb

if you got: i686 GNU/Linux or i386 GNU/Linux
please use x32 package:

nomachine_5.2.21_1_i386.deb

4. Install NoMachine.

x64 system:

sudo dpkg -i nomachine_5.2.21_1_amd64.deb

x32 system:

sudo dpkg -i nomachine_5.2.21_1_i386.deb

5. Gather logs and reproduce the problem like in this link:

https://www.nomachine.com/DT07M00098#1

and send packed logs to forum[at]nomachine[dot]com.

[Author]

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