Installing Release 12.1 on UNIX Workstations (MATLAB Installation Guide for Unix) MATLAB Installation Guide for Unix     Specifying MATLAB Startup Options You can specify startup welcome messages, default definitions, or any MATLAB expressions that you want to run for all users. To do this, edit the M-file matlabrc.m in $MATLAB/toolbox/local, which is invoked automatically each time a user starts MATLAB. If you do not have write-access to matlabrc.m, you can include these same commands in a file called startup.m and store it in the top-level MATLAB directory.  Specify Documentation Viewing Options Configuring MATLAB Products