LinuxQuestions.org - [SOLVED] Download GRUB2 for CentOS 6

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Download GRUB2 for CentOS 6

Dear All,

I am using a CentOS 6.2 64 Bit server (VMWare Virtual Machine).

While browsing some linux sites, I found that using GRUB2, we can have /boot on LVM/RAID. Just wanted to try my hands on it, but I am unable to find any GRUB2 RPM file.

I cannot update by GRUB too through any third party RPM repositories since I do not have an internet connection on the Linux box.

It would be great hep if anyone can provide links to download GRUB2 RPM suitable for CentOS 6.

Nothing around that I can see, I'd suggest just using the source.

Be aware that the CentOS 6.2 kernel update procedures won't know how to update the GRUB-2 configuration files.

Quote:

Originally Posted by acid_kewpie (Post 4698779)

Nothing around that I can see, I'd suggest just using the source.

Thanks Chris, I just used the source file grub-1.99.tar.gz from here.

I ran the following commands on runlevel 3, but still cannot see GRUB2 files like /etc/default/grub or /boot/grub/grub.cfg

Quote:

tar -xzvf grub-1.99.tar.gz
cd grub
./configure
make && make install

Do I need to make some more changes, forgive my ignorance.

I would expect to need to write those myself. You may find some defaults / examples in the source tree? Note that it's certainly not the source software's job to configure the grub.cfg file, it's the distro installer that would generally do that.

Quote:

Originally Posted by acid_kewpie (Post 4698823)

I got this file in the source tar ball

Code:

#

# Sample GRUB configuration file

#



# Boot automatically after 30 secs.

set timeout=30



# By default, boot the first entry.

set default=0



# Fallback to the second entry.

set fallback=1



# For booting GNU/Hurd

menuentry "GNU (aka GNU/Hurd)" {

        set root=(hd0,1)

        multiboot /boot/gnumach.gz root=device:hd0s1

        module /hurd/ext2fs.static ext2fs --readonly \

                        --multiboot-command-line='${kernel-command-line}' \

                        --host-priv-port='${host-port}' \

                        --device-master-port='${device-port}' \

                        --exec-server-task='${exec-task}' -T typed '${root}' \

                        '$(task-create)' '$(task-resume)'

        module /lib/ld.so.1 exec /hurd/exec '$(exec-task=task-create)'

}



# For booting GNU/Linux

menuentry "GNU/Linux" {

        set root=(hd0,1)

        linux /vmlinuz root=/dev/sda1

        initrd /initrd.img

}



# For booting FreeBSD

menuentry "FreeBSD (or GNU/kFreeBSD), direct boot" {

        set root=(hd0,1,a)

        kfreebsd /boot/kernel/kernel

        kfreebsd_loadenv /boot/device.hints

        kfreebsd_module /boot/splash.bmp type=splash_image_data

        set kFreeBSD.vfs.root.mountfrom=ufs:ad0s1a

}

menuentry "FreeBSD (or GNU/kFreeBSD), via /boot/loader" {

        set root=(hd0,1,a)

        kfreebsd /boot/loader

}



# For booting NetBSD

menuentry "NetBSD" {

        set root=(hd0,1,a)

        knetbsd /netbsd

}



# For booting OpenBSD

menuentry "OpenBSD" {

        set root=(hd0,1,a)

        kopenbsd /bsd

}



# For booting Microsoft Windows

menuentry "Microsoft Windows" {

        set root=(hd0,1)

        chainloader +1

}



# For booting Memtest86+

menuentry "Memtest86+" {

        set root=(hd0,1)

        linux16 /memtest86+.bin

}



# Change the colors.

menuentry "Change the colors" {

        set menu_color_normal=light-green/brown

        set menu_color_highlight=red/blue

}

I think I need to create a file /boot/grub/grub.cfg similar to below one.

Code:

#

# Sample GRUB configuration file

#



# Boot automatically after 30 secs.

set timeout=30



# By default, boot the first entry.

set default=0



# Fallback to the second entry.

set fallback=1



# For booting GNU/Linux

menuentry "GNU/Linux" {

        set root=(hd0,1)

        linux /vmlinuz root=/dev/sda1

        initrd /initrd.img

}

I am not sure which all files needs to be removed/created from /boot/grub directory to boot from GRUB2. Any suggestions/links for this ? Thanks for all your help.

Hi Chris,

These commands helped me. I am able to boot from grub2. :D

Quote:

/usr/local/sbin/grub-mkconfig -o /boot/grub/grub.cfg
/usr/local/sbin/grub-install /dev/sda
mv -v /boot/grub/grub.conf /boot/ (Can be removed too)

Now, my next step is to try LVM/RAID on /boot. :)