Stopping the default Operating System from Booting [duplicate]
I use Linux 16.04 and Windows 10 in Dual Boot mode. I have Grub customizer installed and reordered my boot list. But I want to stop the default operating system to boot after the initial 10 seconds passed. I want it to halt as long as I do not choose any operating system to boot. I am badly in need of this. But do not know how to do this.
As explained here, you need to set GRUB_TIMEOUT to -1 in /etc/default/grub file and execute sudo update-grub.