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rated 0 times [  304] [ 0]  / answers: 1 / hits: 863708  / 3 Years ago, mon, september 27, 2021, 9:06:03

In Ubuntu 12.04 (or above), how do I set the GRUB time and the default OS (that I see at boot time) as I'm dual-booting Windows (7/8) and Ubuntu (12.04 or above)?


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  • Press Alt + F2, type gksudo gedit /etc/default/grub press Enter and enter your password.

  • You will see the following contents:




    
GRUB_DEFAULT=0
    
GRUB_HIDDEN_TIMEOUT=0
    
GRUB_HIDDEN_TIMEOUT_QUIET=true
    
GRUB_TIMEOUT=10
    
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
    
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
    
GRUB_CMDLINE_LINUX=""

  • You can change the default from 0 to any number, corresponding to the entry in the Grub bootup menu (first entry is 0, second is 1, etc.)


  • You can change the "hidden timeout" (no menu); and also display the countdown (GRUB_HIDDEN_TIMEOUT_QUIET=false)

  • You can force the grub menu to show by commenting out the two GRUB_HIDDEN lines with a # at the beginning of the line

  • And set the grub menu timeout (default is 10 seconds)


  • Make your changes, press Ctrl + S to save and Ctrl + Q to exit


  • Important: Open a terminal with Ctrl + Alt + T and type sudo update-grub to apply the changes you just made

  • Reboot and you should see your timeout/default entry change





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[#37775] Monday, September 27, 2021, 3 Years  [reply] [flag answer]
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