How to quickly and easily install GRUB for a Linux server

The content of this article is about how to quickly and easily install GRUB for Linux servers. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

How to install GRUB for a Linux server

When you cannot migrate a Linux server with a lower kernel version and a system boot program GRand Unified Bootloader (GRUB) version below 1.99 through the cloud migration tool, For example, CentOS 5 and Debian 7. And when the log file prompts Do Grub Failed, it may be because the system boot program GRUB of version 1.99 or above is not installed.

This article mainly introduces how to install the system boot program GRUB 1.99 version for your source server. The process of installing GRUB 1.99 and above, such as 1.99 and 2.02, is the same. The main difference is that the GRUB version source code package downloaded during the installation process is different. You can visit https://alpha.gnu.org/gnu/grub/ to obtain the download of the new version. address.

Install GRUB 1.99 version

Log in to the source server.

Run the following command to view the paths of the original grub, grub-install and grub-mkconfig:

which grub
which grub-install
which grub-mkconfig

Use the mv command to rename the old versions of grub, grub-install and grub-mkconfig to back up the files. After migrating the server using the cloud migration tool, you can restore the original name to use the original configuration.

mv /sbin/grub /sbin/grub-old
mv /sbin/grub-install /sbin/grub-install-old 
mv /sbin/grub-mkconfig /sbin/grub-mkconfig-old

Run yum install -y bison gcc make to install the bison, gcc and make tools that GRUB depends on.

Run the following command to install flex.

test -d /root/tools || mkdir -p /root/tools
cd /root/tools
wget https://github.com/westes/flex/releases/download/v2.6.4/flex-2.6.4.tar.gz
tar xzf flex-2.6.4.tar.gz
cd flex-2.6.4
mkdir -p build
cd build
../configure
make && make install
ln -s /usr/local/bin/flex /usr/bin/flex

Run the following command to install GRUB 1.99 dependencies.

test -d /root/tools || mkdir -p /root/tools
cd /root/tools
wget https://alpha.gnu.org/gnu/grub/grub-1.99~rc1.tar.gz
tar xzf grub-1.99~rc1.tar.gz
cd grub-1.99~rc1
mkdir -p build
cd build
../configure
sed -i -e "s/-Werror//" ./grub-core/Makefile
make && make install
ln -s /usr/local/sbin/grub-install /sbin/grub-install
ln -s /usr/local/sbin/grub-mkconfig /sbin/grub-mkconfig

Note: If a -Werror error occurs during the compilation process, you can locate the compilation file makefile of the compilation object, remove the -Werror option and recompile.

Run grub-install --version to check whether the GRUB version is updated to 1.99.

Next step

After successfully updating the system boot program GRUB 1.99 version, you can use the cloud migration tool to migrate the server to Alibaba Cloud.

(Optional) After the cloud migration is successful, run the following command to restore the old version of GRUB:

rm /sbin/grub-install
rm /sbin/grub-mkconfig
rm /boot/grub/grub.cfg
mv /sbin/grub-old /sbin/grub
mv /sbin/grub-install-old /sbin/grub-install

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