I piece of occupation Kali Linux with my Windows inward my Laptop (yes I produce piece of occupation Windows too No thank yous for the incoming sarcasms)! 
GRUB 1st selection it counts downwards to v seconds if I don’t produce anything. However, I equally good got Kali Linux on ane of my quondam Desktop too and around other quondam i386 Laptop. Those 2 runs Kali alone too cipher else. So when I commencement those 2 devices, I convey to press Enter or expect v seconds. Now v seconds agency nothing, but me existence somewhat impatient, I wanted to change GRUB timeout inward Kali Linux too laid upwardly it to ZERO (0). It tin equally good hold upwardly done inward VirtualBox (which I run inward my G5 which got 120GB RAM). Either way, this is a modest tut on changing GRUB timeout inward Kali Linux (or whatever Linux equally GRUB options are same everywhere).
Editing GRUB defaults
First of all, edit the file /etc/default/grub
root@kali: # leafpad /etc/default/grub
root@kali: #
- Change
GRUB_TIMEOUTvalue to0. - Add
GRUB_HIDDEN_TIMEOUT=0and GRUB_HIDDEN_TIMEOUT_QUIET=true
See updated config below:
# If yous modify this file, run 'update-grub' later to update
# /boot/grub/grub.cfg.
# For total documentation of the options inward this file, see:
# information -f grub -n 'Simple configuration'
GRUB_DEFAULT=0
GRUB_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX="initrd=/install/gtk/initrd.gz"
Save the file too result the update-grub command.
root@kali: # update-grub
Generating grub configuration file ...
Found background image: /usr/share/images/desktop-base/desktop-grub.png
Found linux image: /boot/vmlinuz-4.0.0-kali1-amd64
Found initrd image: /boot/initrd.img-4.0.0-kali1-amd64
No book groups found
done
root@kali: #
Now reboot too Kali Linux volition non expect for v minute count, it volition merely kick conduct into Kali.
Rollback changes
If yous desire to rollback change, merely produce the opposite, i.e.
GRUB_DEFAULT=0
GRUB_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
Run update-grub dominance too you’re dorsum with that v minute countdown.
Pretty unproblematic but this is a expert commencement for your commencement changing GRUB timeout or full general GRUB configurations. Thanks for reading, produce share.
