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1. #GRUB_HIDDEN_TIMEOUT_QUIET=true
2. .sudo update-grub

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1. # If you changethis file, run'update-grub' afterwards to update
2. # /boot/grub/grub.cfg.
3. # For full documentation
   of the options in
   this file, see:
4. # info -f grub
   -n 'Simple configuration'
5. GRUB_DEFAULT=0
6. #GRUB_HIDDEN_TIMEOUT=0
7. GRUB_HIDDEN_TIMEOUT_QUIET=true
8. GRUB_TIMEOUT=10
9. GRUB_DISTRIBUTOR=`lsb_release-i
   -s 2> /dev/null||
   echo Debian`
10. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
11. GRUB_CMDLINE_LINUX=""
12. # Uncomment to enable BadRAM filtering, modify to suit your needs
13. # This works with Linux
    (no patch required)
    and with any kernel that obtains
14. # the memory map information from GRUB (GNU Mach, kernelof FreeBSD
    ...)
15. #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
16. # Uncomment to disable graphical terminal (grub-pc only)
17. #GRUB_TERMINAL=console
18. # The resolution used on graphical terminal
19. # note that you can use only modes which your graphic card supports via VBE
20. # you can see them in real GRUB with the command `vbeinfo'
21. #GRUB_GFXMODE=640x480
22. # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
23. #GRUB_DISABLE_LINUX_UUID=true
24. # Uncomment to disable generation of recovery mode menu entries
25. #GRUB_DISABLE_RECOVERY="true"
26. # Uncomment to get a beep at grub start
27. #GRUB_INIT_TUNE="480 440 1"

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1. ### BEGIN /etc/grub.d/30_os-prober ###
2. if [
   "x${timeout}" !="x-1"
   ]; then
3. if keystatus; then
4. if keystatus
   --shift; then
5. set timeout=-1
6. else
7. set timeout=0
8. fi
9. else
10. if sleep--interruptible 3; then
11. set timeout=0
12. fi
13. fi
14. fi
15. ### END /etc/grub.d/30_os-prober ###

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1. .GRUB_HIDDEN_TIMEOUT_QUIET=true
2. true 不显示倒计时。屏幕将会是空白的。
3. false 在 GRUB_HIDDEN_TIMEOUT 中配置的时间,空白屏幕上会有一个倒数计时器。
4. 3.GRUB_TIMEOUT=10
5. 此命令将顺从 GRUB_HIDDEN_TIMEOUT 配置,除非 GRUB_HIDDEN_TIMEOUT 被注释掉(#)。若 GRUB_HIDDEN_TIMEOUT 启用,则当菜单显示时,GRUB_TIMEOUT
   将会只执行一次。
6. 配置此值为 -1 将会导致菜单一直显示,直到用户选择。
7. GRUB 2 菜单默认为隐藏,除非其他操作系统被系统检测到。若没有其他操作系统,此行将会被注释掉,除非使用者修改它。为了在每次启动时显示菜单,去掉此行的注释并使用 1 或更大的值。