Warning: Use of undefined constant title - assumed 'title' (this will throw an Error in a future version of PHP) in /data/www.zhuangjiba.com/web/e/data/tmp/tempnews1.php on line 152 grub是什么
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【grub是什么】GNU GRUB 和GRUB是GRand Unified Bootloader的缩写,它是一个多重操作系统启动管理器。用来引导不同系统,如windows,linux。在X86 架构的机器中,Linux、BSD 或其它Unix类的操作系统中GRUB、LILO 是大家最为常用,应该说是主流。
那么grub要如何引导双系统呢?装机吧(www.125315.com)小编来告诉你吧。
使用livecd安装引导
取得root权限并在终端下运行grub
代码:
sudo -s -H
grub
然后,使用如下指令:
oneleaf 写道:
代码:
grub>root (hdX,Y)
grub>setup (hd0)
root 是 /boot 分区的地址,如果不知道可以在 root (hd0, 时按Tab键来补全。
如果按TAB键后你还拿不定主意,那么下面一段也许对你有帮助:
一般/boot就装在你的ubuntu系统所在的分区(如果你不知道ubuntu装在哪儿,可以用cfdisk命令查看)要小心的是hda1相当於(hd0,n-1),例如
yonsan 写道:
如果linux安装根分区为hda5 则执行的是root (hd0,4) 而不是 root (hd0,5)
最后,用
代码:
grub>quit
退出grub,重启系统。
grub可以代替lilo来完成对Linux的引导,与lilo相比,它有以下特点:
①、支持开机画面:grub支持在引导开机的同时显示一个开机画面。对于玩家来说,这样可以制作自己的个性化开机画面;对于PC厂商,这样可以在开机时显示电脑的一些信息和厂商的标志等。grub支持640x480、800x600、1024x768各种模式的开机画面,而且可以自动侦测选择最佳模式,与Windows那320x400的开机画面不可同日而语。
②、支持大硬盘:现在大多数Linux发行版本的lilo都有同样的一个问题:根分区(/boot分区)不能分在超过1024柱面的地方,一般是在8.4G左右的地方,否则lilo不能安装,或者安装后不能正确引导系统。而grub就不会出现这种情况,只要安装时你的大硬盘是在LBA模式下,grub就可以引导根分区在8G以外的操作系统。
③、分区位置改变后不必重新配置:lilo是通过读取硬盘上的绝对扇区来装入操作系统,因此每次分区改变都必须重新配置lilo,例如你用PQ magic调整了分区的大小,那lilo在你重新配置好之前就不能引导这个分区的操作系统了。而grub是通过文件系统直接把核心读取到内存,因此只要操作系统核心的路径没有改变,grub就可以引导系统。 除此之外,Grub还有许多非常强大的功能。例如支持多种外部设备,动态装载操作系统内核,甚至可以通过网络装载操作系统核心。Grub支持多种文件系统,支持多种可执行文件格式,支持自动解压,可以引导不支持多重引导的操作系统等。
④、两种执行模式:grub不但可以通过配置文件进行例行的引导(MBR是什么:http://www.kkzj.com/),还可以在选择引导前动态改变引导时的参数,还可以动态加载各种设备。例如你在Linux下编译了一个新的核心,但不能确定它能不能工作,你就可以在引导时动态改变grub的参数,尝试装载这个新的核心进行使用。Grub的命令行有非常强大的功能,而且支持如bash或doskey一样的历史功能,你可以用上下键来寻找以前的命令。
⑤、菜单式选择:在lilo下,你需要手工输入操作系统的名字来引导不同的操作系统。而grub使用一个菜单来选择不同的系统进行引导。你还可以自己配置各种参数,如延迟时间,默认操作系统等。
责任编辑:装机吧小鱼 版权所有,转载请说明出处
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