Installing from a DVD This section applies if you have received a DVD from a COMSOL representative. The COMSOL Installer is a user interface tool that guides you through the installation process. To start the installer: 1 Insert the COMSOL 5.2a DVD into the DVD drive. 2 If the DVD is not mounted automatically by your operating system, use the mount command to mount it. 3 To start the installation, enter the command sh drivepath/setup where drivepath  is the mount point of the DVD drive, for example /media/cdrom. You might have to mount the DVD with the option -o exec if your Linux mounts the DVD without execute options by default. The COMSOL 5.2a Installer window appears. Now continue with the instructions in the section Running The COMSOL Installer below.