linux卸载内核rpm,CentOS7.X更新最新版本内核「RPM直接安装内核」 - 屈兴东

最近折腾谷歌BBR加速，安装BBR内核后、导致NGINX等软件无法编译安装……全网所有的教程解决方案都试了一遍，无效！什么依赖该装装、该升级升级，没用！最后自己突然想到把内核更新下试试，结果就OK了。写份“CentOS7.X更新最新版本内核「RPM直接安装内核」”，帮助很多遇到同样问题，却找不到解决办法的小伙伴(毕竟生产环境比额外加速啥的更重要啊)。

CentOS7.× 最新内核下载地址：

内核选择：

kernel-lt(lt=long-term)长期有效

kernel-ml(ml=mainline)主流版本

安装过程：

1.下载内核

wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-ml-5.5.9-1.el7.elrepo.x86_64.rpm

2.安装内核

rpm -ivh kernel-ml-5.5.9-1.el7.elrepo.x86_64.rpm

3.查看当前默认内核

grub2-editenv list

4.查看所有内核启动 grub2

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

5.修改为最新的内核启动

grub2-set-default 'CentOS Linux (5.5.9-1.el7.elrepo.x86_64) 7 (Core)'

6.再次查看确认内核

grub2-editenv list

7.重新启动

reboot

8.更新kernel-ml-headers

wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-ml-headers-5.5.9-1.el7.elrepo.x86_64.rpm

rpm -ivh kernel-ml-headers-5.5.9-1.el7.elrepo.x86_64.rpm

9.更新kernel-ml-devel

wget https://elrepo.org/linux/kernel/el7/x86_64/RPMS/kernel-ml-devel-5.5.9-1.el7.elrepo.x86_64.rpm

rpm -ivh kernel-ml-devel-5.5.9-1.el7.elrepo.x86_64.rpm

Ps：补充-旧版本内核的卸载方法：

查看正在使用的内核

uname -a

查看系统中的全部内核

rpm -qa | grep kernel

卸载多余内核

yum remove kernel-x.xx.x相关问题报错代码：

configure: error: in `/root/pure-ftpd-1.0.49':

configure: error: C preprocessor "/lib/cpp" fails sanity check

See `config.log' for more details

make: *** No targets specified and no makefile found. Stop.

checking for uint32_t ... uint32_t not found, u_int32_t not found

./configure: error: can not define uint32_t

make: *** No rule to make target `build', needed by `default'. Stop.

make: *** No rule to make target `install'. Stop.

gmake: *** [default] Error 2

ERROR: failed to run command: gmake TARGET_STRIP=@: CCDEBUG=-g XCFLAGS='-DLUAJIT_ENABLE_LUA52COMPAT -msse4.2' CC=cc PREFIX=/www/server/nginx/luajit

make: *** No targets specified and no makefile found. Stop.

make: *** No rule to make target `install'. Stop.