升级linux内核版本-创新互联

1、安装公钥

sudo rpm --import /tupian/20230521/RPM-GPG-KEY-elrepo.org

2、下载内核

sudo rpm -Uvh /tupian/20230521/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

3、查看内核版本

sudo yum -y --disablerepo="*" --enablerepo="elrepo-kernel" list available

4、安装最新版本

sudo yum -y --enablerepo=elrepo-kernel install kernel-ml
或yum --enablerepo=elrepo-kernel install kernel-lt

5、查看机器上所有能用内核

sudo awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg

6、编辑配置文件

sudo vi /etc/default/grub
GRUB_TIMEOUT=5
GRUB_DEFAULT=0
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

7、写到grub2的启动配置文件

sudo grub2-mkconfig -o /boot/grub2/grub.cfg

8、重启

sudo reboot

9、查看系统中全部的内核：

rpm -qa | grep kernel
yum remove   包名
sudo cat <  kernel.sh
#!/bin/bash
sudo rpm --import /tupian/20230521/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh /tupian/20230521/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
sudo yum -y  --enablerepo=elrepo-kernel install kernel-ml
sudo sed -i  "s/saved/0/"  /etc/default/grub
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
sudo reboot
EOE