If you repartition your boot drive, you may find that you have to reinstall your existing operating system's boot loader2.1 or the entire operating system itself.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman
This can save you the trouble of having to reinstall the system from scratch.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman
This way, if you later reinstall the package, you won't have to set everything up a second time.
"Debian GNU/Linux: Guide to Installation and Usage"
John Goerzen and Ossama Othman