How to adjust the boot sequence of multiple systems by Ubuntu 04/25 Update SLTechnology News&Howtos

How to adjust the boot sequence of multiple systems by Ubuntu

2025-04-25 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >

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This article introduces the relevant knowledge of "how to adjust the startup order of multiple systems by Ubuntu". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

After we enter Ubuntu, open the terminal and back up the startup list file menu.lst of Grub:

The code is as follows:

Sudo cp / boot/grub/menu.lst / boot/grub/menu.lst.bak

Then use Gedit to edit menu.lst

The code is as follows:

Sudo gedit / boot/grub/menu.lst

When you open it, you will see very long things, but all those things that start with "#" are useless, and there is only one place we need to change (about 18 lines): default 0

This 0 means that the default startup item for Grub is Ubuntu, and we want to change it to. This is due to the machine. Let's move on.

# menu.lst-See: grub (8), info grub, update-grub (8)

# grub-install (8), grub-floppy (8)

# grub-md5-crypt, / usr/share/doc/grub

# and / usr/share/doc/grub-doc/.

# # default num

# Set the default entry to the entry number NUM. Numbering starts from 0, and

# the entry number 0 is the default if the command is not used.

# You can specify 'saved' instead of a number. In this case, the default entry

# is the entry saved with the command 'savedefault'.

# WARNING: If you are using dmraid do not use 'savedefault' or your

# array will desync and will not let you boot your system.

Default 0

# # timeout sec

# Set a timeout, in SEC seconds, before automatically booting the default entry

# (normally the first entry defined).

Timeout 10

# # hiddenmenu

# Hides the menu by default (press ESC to see the menu)

# hiddenmenu

# Pretty colours

# color cyan/blue white/blue

# # password ['--md5'] passwd

# If used in the first section of a menu file, disable all interactive editing

# control (menu entry editor and command-line) and entries protected by the

# command 'lock'

# e.g. Password topsecret

# password-- md5 $1 $gLhU0/$aW78kHK1QfV3P2b2znUoe/

# password topsecret

# examples

# title Windows 95/98/NT/2000

# root (hd0,0)

# makeactive

# chainloader + 1

# title Linux

# root (hd0,1)

# kernel / vmlinuz root=/dev/hda2 ro

# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

# BEGIN AUTOMAGIC KERNELS LIST

# # lines between the AUTOMAGIC KERNELS LIST markers will be modified

# # by the debian update-grub script except for the default options below

# # DO NOT UNCOMMENT THEM, Just edit them to your needs

# Start Default Options # #

# # default kernel options

# # default kernel options for automagic boot options

# # If you want special options for specific kernels use kopt_x_y_z

# # where x.y.z is kernel version. Minor versions can be omitted.

# # e.g. Kopt=root=/dev/hda1 ro

# # kopt_2_6_8=root=/dev/hdc1 ro

# # kopt_2_6_8_2_686=root=/dev/hdc2 ro

# kopt=root=UUID=898431cf-4249-4de1-a492-7e2f4afd49a9 ro locale=zh_CN

# # default grub root device

# # e.g. Groot= (hd0,0)

# groot=3738b672-62f3-490d-916a-cad379fdb57b

# # should update-grub create alternative automagic boot options

# # e.g. Alternative=true

# # alternative=false

# alternative=true

# # should update-grub lock alternative automagic boot options

# # e.g. Lockalternative=true

# # lockalternative=false

# lockalternative=false

# # additional options to use with the default boot option, but not with the

# # alternatives

# # e.g. Defoptions=vga=791 resume=/dev/hda5

# defoptions=quiet splash

# # should update-grub lock old automagic boot options

# # e.g. Lockold=false

# # lockold=true

# lockold=false

# # Xen hypervisor options to use with the default Xen boot option

# xenhopt=

# # Xen Linux kernel options to use with the default Xen boot option

# xenkopt=console=tty0

# # altoption boot targets option

# # multiple altoptions lines are allowed

# # e.g. Altoptions= (extra menu suffix) extra boot options

# # altoptions= (recovery) single

# altoptions= (recovery mode) single

# # controls how many kernels should be put into the menu.lst

# # only counts the first occurence of a kernel, not the

# # alternative kernel options

# # e.g. Howmany=all

# # howmany=7

# howmany=all

# # should update-grub create memtest86 boot option

# # e.g. Memtest86=true

# # memtest86=false

# memtest86=true

# # should update-grub adjust the value of the default booted system

# # can be true or false

# updatedefaultentry=false

# # should update-grub add savedefault to the default options

# # can be true or false

# savedefault=false

# End Default Options # #

Title Ubuntu 8.10, kernel 2.6.27-11-generic