License Management (MATLAB Installation Guide for Unix) MATLAB Installation Guide for Unix     Specifying the Location of the License File The environment variable LM_LICENSE_FILE defines where the license manager looks for the License File. By default, The MathWorks appends the value $MATLAB/etc/license.dat to this variable. If you want to change the value of this environment variable to point to some other location, you must edit the.matlab6rc.sh script, which resides in $MATLAB/bin. If you change the definition of LM_LICENSE_FILE in .matlab6rc.sh, you need to edit the license manager options file $MATLAB/etc/lmopts.sh to change the LM_FILE variable assignment. For example, if you change the location of the License File to /usr/licenses/license.dat, use the assignment LM_FILE=/usr/licenses/license.dat in the license manager options file.  License File Determining Your Hostid