69 lines
1.1 KiB
Markdown
69 lines
1.1 KiB
Markdown
### 1. 更新系统
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```bash
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yum update -y
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```
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### 2.添加elrepo软件源
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```bash
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yum install vim -y
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vi /etc/yum.repos.d/elrepo.repo
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# 添加以下内容
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cat > /etc/yum.repos.d/elrepo.repo << EOF
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[elrepo]
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name=elrepo
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baseurl=https://mirrors.aliyun.com/elrepo/archive/kernel/el7/x86_64
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gpgcheck=0
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enabled=1
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EOF
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```
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### 3. 刷新源数据缓存
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```bash
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yum clean all && yum makecache
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```
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### 4. 安装5.4内核
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#### 4.1 列出可用内核
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```bash
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[root@centos7 ~]# yum list kernel-lt
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已加载插件：fastestmirror
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Loading mirror speeds from cached hostfile
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* base: mirrors.aliyun.com
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* extras: mirrors.aliyun.com
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* updates: mirrors.aliyun.com
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可安装的软件包
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kernel-lt.x86_64 5.4.265-1.el7.elrepo elrepo
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```
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#### 安装指定内核
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```bash
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yum install -y kernel-lt-5.4.265
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yum install -y kernel-lt-devel-5.4.265
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```
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### 5. 查看安装内核版本
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```bash
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awk -F\' '$1=="menuentry " {print i++ " : " $2}' /etc/grub2.cfg
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```
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### 6. 设置默认内核
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```bash
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grub2-set-default 0
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```
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### 7. 重启
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```bash
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reboot
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```
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