Help rebooting my note 5

[AC Question]

How do i reboot my Note 5 and will I lose anything(apps,music,file,etc.) by rebooting
Thank u

 

[Rukbat]

Hold the power button down until it reboots - you won't lose anything.

(Or did you mean "reinstall the operating system"? That's not rebooting. Rebooting is restarting the operating system.)