Is it possible to install the distribution without using a DVD-disk or a flash drive? Yes. A downloaded iso-image with a distribution on your computer and a special program GRML-rescueboot are enough for this.
The instructions below will help you do this without additional physical media: DVD or USB flash drive. 1. First of all, you should already have one of the OS Linux installed and running: Linux Mint/ Ubuntu or another. 2. You should have as well ISO image with the distribution you want to install. 3. Install the GRML-rescueboot program from the Software Manager or run the command in the terminal:
sudo apt-get install grml-rescueboot
4. After installing GRUB-rescue boot, you can find an empty folder called grml (/boot/grml) by opening it as an root:
or in the terminal:
sudo nemo /boot/grml
Or another file manager of your distribution. When the file manager with administrator rights opens, open the folder with the downloaded iso image and just copy the file to the grml folder.
5. Update GRUB:
An additional line should appear in the boot loader menu:
6. Restart your computer and you will see a new option in your GRUB boot:
Now you can install this distribution directly from your hard drive by clicking on this option with the down arrow and pressing Enter.
As you can see in the picture, I thus booted up in live-mode Elementary OS 0.4.1, with the possibility of further installation. Note. People talking not all distributions can be installed in this way. I don't know why. Try and you will see! May the Force be with you, Good Luck!!! grml.org