How to change the default boot OS in GRUB – Ubuntu

If you're doing a dual boot and you want to change the default operating system that comes up, o' say, during a unplanned restart, you can do this with the Startup Manager, this will then make the change in *GRUB. Just do the following: (If you know of an easier way for amateurs please comment below details.)

Go to System / Administration / Synaptic Package Manager and search for StartUp Manager. Install it then go to it under System / StartUp-Manager and change the Default operating system as seen below. The change will occur the next time you boot.

* GNU GRUB (short for GNU GRand Unified Bootloader) is a boot loader package from the GNU Project. GRUB (shortened form of GNU GRUB) is the reference implementation of the Multiboot Specification, which enables a user to have multiple operating systems on his computer, and choose which one to run when the computer starts. GRUB can be used to select from different kernel images available on a particular operating system's partitions, as well as pass boot-time parameters to such kernels. (From Wikipedia, the free encyclopedia)