First, make a mount point, which is just a folder. For example:
mkdir /media/mathworks
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ps: change user to root as:
sudo -s
change the file that can be written:
sudo chown username [foldername] -R
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Then mount the downloaded ISO to that directory. For this example, the ISO is in the home folder under the downloads folder and the ISO is called matlab.iso:
mount -t iso9660 -o loop ~/downloads/matlab.iso /media/mathworks
Now you can navigate there and run the installer as if it were a copy of the DVD, for example:
cd /media/mathworks
./install
If you are unable to utilize the ISO image, you may be able to request a DVD in the License Center. See the related solution below.
pps:
Error: can't find /lib/libc.so.6 in 12.04
sudo ln -s /lib/i386-linux-gnu/libc.so.6 /lib/libc.so.6