reason
In the desktop environment, right-click the mouse to mount (it cannot be decompressed, and the installation will fail after decompression), or Terminal:
Solution
mkdir ~/matlab //用户主目录下新建文件夹 matlab
sudo mount -o loop Matlab911R2021b_Lin64.iso ~/matlab //将 iso 文件挂载在 ~/matlab 目录下
Note: Terminal starts the installation (the current user is enough, please do not switch to root or add sudo before the installation command, otherwise it will freeze and become unresponsive):