Matlab is installed in ubuntu but i am unable to open it

After complete installation of MATLAB, i am not able to open it by applying following command in terminal.

./matlab

Operating system: UBUNTU 18.04

Following is the photo of directory where i installed MATLAB.

Answer 1

[Bjorn Gustavsson]

If you try to execute something like ./matlab from your terminal you tell the shell to run an executable command "matlab" in the current directory. That would work if you were in the bin-subdirectory of your matlab-installation directory, or in a directory where you had a link matlab pointing to that executable.

Further, it seems that you've installed matlab with ~you/Documents as the installation-directory. That's not pretty. Matlab is not a document. On my machine I have all matlab-releases in a directory /usr/local/MATLAB/, and when I install matlab I do it as super-user so that it get properly installed with executables (links to /usr/local/MATLAB/R2020a/bin/matlab etc) in /usr/local/bin. That way I will have matlab on the shell-path so that I can start it from the shell like: matlab -nodesktop (my prefered way).

I suggest that you re-install matlab as super-user and select to create links in /usr/local/bin (that is the default suggestion IIRC). If you cannot do that and have no user with sys-admin privileges at hand I think you should still move the full installation from your Documents directory, and create a link to the matlab-executable in the bin-directory from a directory on the path you have in your shell (perhaps ~/bin).

HTH

[Saifullah Khan Khalil]

Output of command ./matlab is following

[Saifullah Khan Khalil]

actually reason for changing the directory was that there was not enough space to install matlab in

usr/local

[Rik]

You should run the activation as the same user with which you run Matlab. So if you run Matlab as root, you should provide root as the username. At least that is how I understand it.

[Saifullah Khan Khalil]

yes i activated it by following commands in terminal in directory

sh activate_matlab.sh

after that i am able to open matlab by applying the following command in terminal

./matlab

but i think there is still something missing. Command window of matlab says

The desktop configuration was not saved successfully

here is the screenshot

[Bjorn Gustavsson]

Does the file exist already - with some peculiar permissions? Does the directory exist? Do you have write permissions in that directory. These are typically the things I've messed up when that error-message comes up...

[Saifullah Khan Khalil]

Issue seems to be resolved by taking ownership of the .matlab folder in the home folder with the following command "<username> your username"

sudo chown <username> -R ~/.matlab

but savepath ends with warning.

[Bjorn Gustavsson]

That seems to be a problem due to your call to matlab trying to save the path in the matlab installation/local directory - that is overwrite the pathdef of your matlab-installation, possibly with the path as you have after starting matlab (when you "typically" might have added additional directories of yours where you have your matlab-functions and toolboxes.). That's something that I've made sure to never do. My path-setups I put in my startup.m file (more modern use would be to have a your pathsetup.m in your .matlab-directory.). My suggestion would be to disable write-permissions in the matlab-installation-directories (just to avoid mistakes of overwriting important matlab-files, that will not be fun and will happen just before "the important deadline".)

Also: make sure not to put the directories of your own in the toolboxes subdirectory. That will mess up matlabs path/cashing/JIT-handling. Put those in some directory ~username/matlab directory, and make sure that they are added to the path on startup.

Answer 2

[Image Analyst]

Try clicking the "Error -9" tag on the right hand side of this page.

Or else call the Mathworks for fast and free technical support.