In a instruction from 170707 I will show you how easy it is to have several Linux systems installed on one computer together with for example Windows 10. The configuration is so simple a ten year old child can do it.
Ubuntu and all Linux systems based on Ubuntu (such as Linux Mint) uses Grub2 as boot manager. Also Debian and most other Linux systems use Grub2. Grub2 works differently from the old Grub Legacy.
Configuring Grub2 – Example for non-UEFI BIOS computers
One of my computers, an Acer Aspire 5750G from 2010, has a 750 GB hard drive and an external USB hard drive of 1000 GB. On that computer I have Windows 10 and twelve (12) different Linux systems installed. Of those twelve systems three are Android-x86 systems (AndEX Nougat and AndEX Marshmallow). In my instruction from 170707 I will describe step by step how I configured Grub2 in the easiest way possible.