I have Ubuntu .iso file downloaded in my Linux Mint - how to install Ubuntu OS?

Question

From my Linux Mint operating system, how do I install/dual-boot this Ubuntu OS which is downloaded as a .iso file?

So that it comes up as an option to boot into when I first turn on my computer. Thanks.

Answer 1

Linux Mint has an application for creating bootable live USBs for installing Linux distros called Startup Disk Creator (usb-creator-gtk).

The USB flash drive that you use with Startup Disk Creator should be 2GB or larger, and for Ubuntu 18.04 and later it should be 4GB or larger. Startup Disk Creator will automatically format your USB flash drive to FAT32 and make it bootable. If you have only one USB flash drive plugged in to your computer, Startup Disk Creator will select it automatically. Be very careful to select the USB flash drive in the Make Startup Disk window in order to avoid overwriting the partition which Mint is installed on, which may make Mint unbootable. In the screenshot below you can see how the USB flash drive Device is identified by its model name, the same model name that appears under the Drive heading after Model: in the Disks (disk utility) application.

Answer 2

I usually go the tried and true method: Burn to a CD and pop in drive, reboot, change the boot order in the BIOS to boot from CD FIRST, reboot a second time and install.

This may be your only option. I know Ubuntu has an app called Wubi that can install from within a OS but its windows specific.

So in your case, crack into a terminal

dd if=/dev/drive of=my_distro.iso bs=2048

or you can get a copy of something like k3b or Brasero and burn through a GUI.

EDIT: Also, verify the checksum of the ISO before you burn. Will save you MANY headaches if you somehow got a bad ISO.