Could you please let us know more information about the issue? Did you download the installer from the bitnami.com site and run these commands?
curl -LJO "https://downloads.bitnami.com/files/stacks/lampstack/5.6.40-0/bitnami-lampstack-5.6.40-0-linux-x64-installer.run
chmod +x ./bitnami-lampstack-5.6.40-0-linux-x64-installer.run
It should open a new window with the installer wizard but in case you don't have a graphical interface in your machine, you will need to use the command line wizard to install the stack.