Why am I asked for my account credentials at every startup?

I am using Matlab R2016b on Linux Fedora 24. Can I permanently set my account credentials so I am not asked at every startup?

[Jose Carrasco]

Same issue here, did you figure it out?

[Umar]

Hi @Paolo & @Jose,

You can set your account credentials permanently to avoid being asked at every startup by using the matlab.prf file. This file stores preferences for Matlab. You can add your credentials to this file to automate the login process. Here is an example of how you can do this:

% Open the matlab.prf file

edit(fullfile(prefdir, 'matlab.prf'));

Add the following lines to the matlab.prf file:

login_name=YourUsername

login_passwd=YourPassword

Replace YourUsername and YourPassword with your actual credentials. Save the file, and Matlab will use these credentials automatically at startup. Remember to keep your credentials secure as they will be stored in plain text in the matlab.prf file. For more information on matlab.prf, please refer to

https://blogs.mathworks.com/community/2010/01/11/the-preferences-folder-matlabprf/

Please update if this helps resolve your issue.

Answer 1

[UDAYA PEDDIRAJU]

Hi Paolo,

You're being prompted for your MathWorks account credentials at every MATLAB startup likely due to one of these reasons:

1. Login Named User (LNU) or Online Licensing (OLL):

• Check your MATLAB installation directory. Navigate to the "licenses" folder and open "license_info.xml".
• Look for the licmode setting:
• licmode="online" indicates LNU.
• licmode="onlinelicensing" indicates OLL.

2. Behavior by Design:

• If you're using a MATLAB Docker image, it might be configured to request credentials every time for security reasons.

Solution:

• LNU: Delete the "license_info.xml" file to avoid credential prompts at startup. (Caution: This might have licensing implications, check MathWorks documentation: https://www.mathworks.com/matlabcentral/answers/168441-what-is-login-named-user-and-how-can-i-use-it .)