Gentoo /boot/boot用途解析～

    安装Gentoo时无意中发现/boot/boot是一个指向本身的链接，于是跑到Gentoo的论坛上去问了一下，结果管理员大大很快就给出了答案，简而言之是为了使得grub保持简单，因为grub引导系统时，linux的文件系统树并没有集合起来，这个时候/下面是找不到/boot的，即使是“point root (hd,x,y) to / as /boot“也是不行的，所以解决方法就是一个symlink to itself(.)

 

帖子地址：http://forums.gentoo.org/viewtopic-p-6172018.html#6172018

内容如下：

 

hewig-ovens

发表于: Sat Feb 13, 2010 1:57 am    发表主题: why /boot/boot is a symbolic link?      

#file /boot/boot#/boot/boot: symbolic link to '.'
I am very curious about why~
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NeddySeagoon
Administrator

来自: 56N 3W        发表于: Sat Feb 13, 2010 5:35 am    发表主题:      

hewig-ovens,

Its to keep the grub documentation simple.

When you do not have a boot partition and /boot is a directory on the / (root) partiton, the pathname to your kernel is
/boot/kernel...

and the root (hdx,y) statement points to your / (root) partition.
Now everything works as expected.

When you have a real boot, the root (hdx,y) statement points to the boot partition and a kernel at /boot/kernel... will not be found as the path /boot does not exist.
As the filesystem tree is not assembled when grub boots the system, you can't point root (hd,x,y) to / as /boot is not attached.

The solution is a symlink called boot, pointing to itseld (.) so the kernel can still be at
/boot/kernel...

but now, the symlink is used to satisfy the reference to /boot
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Regards,

NeddySeagoon