如何在启动时显示 grub?

如何在启动时显示 grub?

因此,我进行了双启动,删除了 Windows 分区,然后删除了 Windows 的启动文件并更新了 grub,现在我的 PC 可以直接启动到 ubuntu。但是,我希望仍然保留 grub 选项,这样我就可以在内核之间切换,并且我想让它永久存在。

我已经阅读了有关此事的资料并且发现建议从 grub 文件中注释掉以下行:

GRUB_HIDDEN_TIMEOUT=0

然而文件中却没有这一行,其唯一内容是:

# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

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

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"

这是什么意思?我应该注释掉这一GRUB_TIMEOUT_STYLE=hidden行吗?还是怎么做?

答案1

编辑文件/etc/default/grub,找到以下行:

 GRUB_TIMEOUT_STYLE=hidden

将该行更改为:

GRUB_TIMEOUT_STYLE=menu

最重要的是,进行更改后,保存文件并运行:

 sudo update-grub

有时如果 grub 没有正确安装,你可能需要

如果启动是旧式

sudo grub-install /dev/sdx

或者

sudo grub-install --force /dev/sdx

sdx 是启动驱动器 sda、sdb 或 sdc,如果启动是 EFI,则需要指定 EFI 系统分区的安装位置:

 sudo grub-install --efi-directory=<address of efi-directory (eg. /mnt/efi)>

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