Home System Tutorial LINUX Compile and install the latest Linux Kernel 6.0 rc3 on CentOS7

Compile and install the latest Linux Kernel 6.0 rc3 on CentOS7

Feb 13, 2024 pm 08:20 PM
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哪个男孩不想手动编译一份自己的内核呢?

CentOS7 编译安装最新的Linux Kernel 6.0 rc3

安装编译环境

CentOS7安装必要的包

yum groupinstall "Development Tools" -y &&
yum install openssl-devel -y &&
yum install rpm-build redhat-rpm-config asciidoc hmaccalc perl-ExtUtils-Embed pesign xmlto -y &&
yum install audit-libs-devel binutils-devel elfutils-devel elfutils-libelf-devel -y &&
yum install ncurses-devel newt-devel numactl-devel pciutils-devel python-devel zlib-devel -y
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CentOS7更新gcc版本

必须升级gcc版本,centOS7自带的gcc版本是4.8.5,编译内核会出错

 sudo yum install centos-release-scl -y &&
 sudo yum install devtoolset-8-gcc* -y &&
 scl enable devtoolset-8 bash
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永久替换旧的gcc( 可选操作 )

mv /usr/bin/gcc /usr/bin/gcc-4.8.5 &&
ln -s /opt/rh/devtoolset-8/root/bin/gcc /usr/bin/gcc &&
mv /usr/bin/g++ /usr/bin/g++-4.8.5 &&
ln -s /opt/rh/devtoolset-8/root/bin/g++ /usr/bin/g++
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下载最新的Linux Kernel6.0 rc3

从kernel.org下载6.0 rc3 的压缩包有203MB,由于国内网络的特殊情况下载会非常的慢,请自备加速手段或者耐心。

 wget https://git.kernel.org/torvalds/t/linux-6.0-rc3.tar.gz
tar zxvf linux-6.0-rc3.tar.gz 
cd linux-6.0-rc3
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配置config

以下配置config文件的操作二选一,如果拿不准就选择第一个,有图形配置界面的。编辑config文件可以选定编译过中需要的内核模块或者组件。不懂不知道就全程默认。

通过menuconfig

make menuconfig
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linux-6.0-rc3目录下敲这个命令,会进去一个配置界面,如果看不懂就保持默认配置,就按右方向键选定 save 然后回车,根据提示保存.config文件,
CentOS7 编译安装最新的Linux Kernel 6.0 rc3

cat  .config //查看有没有正确保存
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根据现有内核拷贝生成config

也可通过现有内核参数去生成新的配置参数文件.config 。要注意 /boot/config-3.10.0-957.el7.x86_64,就是/boot/目录下面这个相似的目录。或许不同CentOS7的路径名不同。要根据实际机器的目录改动。

cp /boot/config-3.10.0-957.el7.x86_64 ./.config 
make oldconfig //操作这里要一路回车
cat  .config
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执行编译

我要再提醒你一次,金箍戴上以后,你再也不是一个凡人,执行以下命令,你将是一个编译Linux内核的人。-j12参数是因为我给虚拟机分配了12核,让这12核别闲着。根据自己机器的情况改成 -j6、 -j8甚至 -j100都行。自行测试胡改的后果。编译过程费时费力,看编译机器的性能。假如是1C1G的云服务器执行编译,可以先去睡一觉。

make -j12 all
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上面命令跑完后,内核模块如果没有特殊需求,可以把内核模块的debug信息给去掉,节约点硬盘空间。

make INSTALL_MOD_STRIP=1 modules_install > /dev/null &&
make modules_install &&
make install 
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设置默认新的kernel启动

sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg &&
sudo grub2-set-default 0 &&
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
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编译成rpm包

编译出单独的通用RPM包可以在其他的CentOS 7机器上直接安装,免去了以上繁琐的手动编译的过程。
在当前目录linux-6.0-rc3下执行 :

yum -y install rpm-build && make rpm-pkg -j32
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如果需要压缩体积,可以将make rpm-pkg -j32 换成 make INSTALL_MOD_STRIP=1 rpm-pkg 。

这条命令又会执行一会。执行完不出意外,会在系统的~/rpmbuild/RPMS/x86_64/ 目录下出现三个rpm安装包。

-rw-r--r--. 1 root root  69354600 8月  31 19:46 kernel-6.0.0_rc3-1.x86_64.rpm
-rw-r--r--. 1 root root 179586568 8月  31 19:48 kernel-devel-6.0.0_rc3-1.x86_64.rpm
-rw-r--r--. 1 root root   1545516 8月  31 19:47 kernel-headers-6.0.0_rc3-1.x86_64.rpm
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在其他机器CentOS7上安装(yum localinstall kern* -y)这三个rpm包就行可以更新内核了。三个包装完还要更新一下启动项。

sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg &&
sudo grub2-set-default 0 &&
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
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这是我打包好的三个rpm包,有兴趣的朋友可以下载安装试试。不做任何可靠保证,请避免在生产环境上直接使用。
CentOS7 编译安装最新的Linux Kernel 6.0 rc3

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