看看我的grub如何修改等待时间

[tuhaihe]

我的电脑就只有Ubuntu一个系统，开机grub不出现。我想让它等待几秒钟，因该修改哪？

代码： 全选

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
  set saved_entry=${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z ${boot_once} ]; then
    saved_entry=${chosen}
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
fi
insmod ext2
set root='(hd0,2)'
search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ ${recordfail} = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.32-24-generic' --class ubuntu --class gnu-linux --class gnu --class os {
	recordfail
	insmod ext2
	set root='(hd0,2)'
	search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
	linux	/boot/vmlinuz-2.6.32-24-generic root=UUID=34e74e47-1481-40c0-b36a-748555abb0ce ro   quiet splash
	initrd	/boot/initrd.img-2.6.32-24-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-24-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
	recordfail
	insmod ext2
	set root='(hd0,2)'
	search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
	echo	'Loading Linux 2.6.32-24-generic ...'
	linux	/boot/vmlinuz-2.6.32-24-generic root=UUID=34e74e47-1481-40c0-b36a-748555abb0ce ro single 
	echo	'Loading initial ramdisk ...'
	initrd	/boot/initrd.img-2.6.32-24-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
	insmod ext2
	set root='(hd0,2)'
	search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
	linux16	/boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
	insmod ext2
	set root='(hd0,2)'
	search --no-floppy --fs-uuid --set 34e74e47-1481-40c0-b36a-748555abb0ce
	linux16	/boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
if [ ${timeout} != -1 ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

[leeaman]

请看本版块的smallapple的教程

[harryzwh]

else
set timeout=10
最后的数字，单位是秒

[cugxuetao]

if [ ${recordfail} = 1 ]; then
set timeout=-1
else
set timeout=10
把set timeout=-1这里的-1改成你想修改的时间，不能和下面的10秒冲突

[snowtown86]

edit /etc/default/grub

代码： 全选

timeout 3

then sudo update-grub