我手边没有可以重启的linux。不过从ubuntu上的简介来看，应该是这样没有错。
http://ubuntuforums.org/showthread.php?t=1195275
- *GRUB_HIDDEN_TIMEOUT=0*
- The menu will be hidden unless a # symbol is present at the
beginning of this line. ( # GRUB_HIDDEN_TIMEOUT=0 )
- The default setting initially depends on the presence of other
operating systems.
- Another OS Detected: The menu will be displayed. ( The line will
begin with a # symbol. )
- No other OS Detected: The menu will be hidden.
- For integers greater than 0, the system will pause, but not display
the menu, for the entered number of seconds.
- *0* The menu will not be displayed. There will be no delay. When
this entry is set to 0:
- The user may force displaying the menu as the computer boots by
holding down the SHIFT key.
- During boot, the system will check the SHIFT key status. If it
cannot determine the key status, a short delay will enable the user to
display the menu by pressing the ESC key.
- If enabled, the splash screen designated in 05_debian_theme will be
displayed. This setting hides the menu only.
- *GRUB_HIDDEN_TIMEOUT_QUIET=true*
- true - No countdown is displayed. The screen will be blank.
- false - A counter will display on a blank screen for the duration of
the GRUB_HIDDEN_TIMEOUT value.
当GRUB_HIDDEN_TIMEOUT=0时，菜单不会显示，也不会有延迟，用户可以按下shift键(grub-legacy中是Esc)强制显示菜单，如果系统在启动过程中不能确定shift键的状态，会有一个短暂的延迟让用户按下Esc键来显示菜单。
GRUB_HIDDEN_TIMEOUT_QUIET=true是不显示倒计时。
你修改了文件之后执行update-grub命令的输出是否正常？有没有报错信息？执行命令之后的/boot/grub/grub.cfg文件和之前有没有区别？启动的时候是否按下了Shift键或者Esc键？
2009/11/23 窦peiqi <[email protected]>
> GRUB_DEFAULT=0
>
> GRUB_HIDDEN_TIMEOUT=0
> GRUB_HIDDEN_TIMEOUT_QUIET=true
> GRUB_TIMEOUT=3
> GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
> GRUB_CMDLINE_LINUX_DEFAULT="quiet"
> 这是我的/etc/default/grub 文件内容，update-grub后不管用。
>
>
> 2009/11/23 Alyex Ye <[email protected]>
>
>
>> 这个版本的变化还是很大的，在Grub2中是不可以直接编辑/boot/grub/grub.cfg的，否则在下次升级或者其他变化的时候，update-grub命令（手动或自动）会将其覆盖。
>>
>> 正确的方法是修改/etc/default/grub文件，其中有2个参数
>> GRUB_HIDDEN_TIMEOUT=0
>> GRUB_HIDDEN_TIMEOUT_QUIET=true
>> 可以隐藏倒计时
>>
>> 修改完成后sudo update-grub即可。
>>
>>
>> 2009/11/21 ganquan <[email protected]>
>>
>>> sorry,怪我太粗心，没看到是grub2。
>>> 我不清楚grub2的配置，抱歉。
>>> On Sat, Nov 21, 2009 at 04:07:30PM +0800, 窦培琪 wrote:
>>> > 我想要的效果是用像老版grub那样的命令：hiddenmenu，这个命令在grub2中没有了。
>>> > grub2默认配置文件是：/boot/grub/grub.cfg。
>>> > 我电脑里还装有win。
>>> >
>>> > 2009/11/21 ganquan <[email protected]>
>>> >
>>> > 去/boot/grub/menu.list里面把你不想要的东西注释掉就可以了。
>>> > 或者直接把timeout设置为0，这样就不用显示菜单，直接启动第一个启动项了
>>> > On Sat, Nov 21, 2009 at 03:59:56PM +0800, 窦培琪 wrote:
>>> > > 如题。
>>> > > 谢谢
>>> >
>>> > --
>>> > Hi! I'm Ganquan.
>>> > http://imganquan.org
>>> >
>>> >
>>> > --
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>>> [email protected]
>>> > with a subject of "unsubscribe". Trouble? Contact
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>>> >
>>> >
>>> >
>>>
>>> --
>>> Hi! I'm Ganquan.
>>> http://imganquan.org
>>>
>>>
>>> --
>>> To UNSUBSCRIBE, email to [email protected]
>>> with a subject of "unsubscribe". Trouble? Contact
>>> [email protected]
>>>
>>>
>>
>>
>> --
>> Best Regards,
>> Alex
>>
>
>
--
Best Regards,
Alex
