How to Install additional toolbox of MATLAB in Ubuntu using Add-ones?

I am using Ubuntu 18.04.I am using MATLAB R2019b Version.I want to add Global Optimization toolbox in MATLAB but whenever I try to install any Toolbox, it shows me Unable to write!! I am attaching screenshot of error message. Can anyone suggests me how should I proceed??

[Kojiro Saito]

Could you check file permissions?

In Terminal (Console),

ls -l /usr/local/MATLAB/R2019b

[Harry Bakker]

I have the same problem standard this folder has only root permissions. This is probaly because you'll need root permissions to install matlab. so is there a way to run the add-on product installeer as root?

I think that will solve the problem, i do not know where this programe is located.

Edit:

Hier is a link for 2 solutions that might work.

https://nl.mathworks.com/matlabcentral/answers/334889-can-t-install-any-toolboxes-because-can-t-write-to-usr-local-matlab-r2017

[nssibi chayma]

I am using Ubuntu 22.04.I am using MATLAB R2018b Version.I want to add Global Optimization toolbox in MATLAB but whenever I try to install any Toolbox, it shows me Unable to write!! I am attaching screenshot of error message. Can anyone suggests me how should I proceed??

[Wendelin Potz]

Have you tried this ?

sounds like you have the standard "cant install toolboxes" issue...

https://www.youtube.com/watch?v=W8F9ADbIFLg

TLDR: run these commands to fix the issue

sudo chown -R $LOGNAME: /usr/local/MATLAB/your_version_here 
sudo chmod u+rwx -R /usr/local/MATLAB/your_version_here

[Nicolas]

you must run matlab with sudo to update add-ons.

in a console:

sudo matlab

and then, try again!