升级内核-4.19

1.下载内核软件包

https://mirrors.tuna.tsinghua.edu.cn/kernel/v4.x/

2.解包

[root@kernel ]# tar xf linux-4.19.100.tar.xz

3.安装依赖

[root@kernel ]# yum install ncurses-devel bison flex elfutils-libelf-devel groupinstall "Development Tools" -y

4.配置

[root@kernel ]# cd linux-4.19.100
[root@kernel linux-4.19.100]# make menuconfig

5.编译

[root@kernel linux-4.19.100]# make -j 4

6.安装模块

[root@kernel linux-4.19.100]# make modules_install
[root@kernel linux-4.19.100]# make install

7.更改默认启动核心

将GRUB_DEFAULT=saved 改成 GRUB_DEFAULT=0
[root@kernel ]# vim /etc/default/grub 
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=0
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

8.使配置文件生效

[root@kernel ]# grub2-mkconfig -o /boot/grub2/grub.cfg 

efault 'CentOS Linux (4.19.100) 7 (Core)' //设置默认启动内核

一灯一暗