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查看内核
uname -r
设置内核源
主要是 http://elrepo.org/tiki/tiki-index.php
ELRepo 仓库是基于社区的用于企业级 Linux 仓库，提供对 RedHat Enterprise (RHEL) 和 其他基于 RHEL的 Linux 发行版（CentOS、Scientific、Fedora 等）的支持。
ELRepo 聚焦于和硬件相关的软件包，包括文件系统驱动、显卡驱动、网络驱动、声卡驱动和摄像头驱动等。
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh https://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
查看可用系统内核包
yum --disablerepo="*" --enablerepo="elrepo-kernel" list available
4.4 和5.0 可以使用
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* elrepo-kernel: hkg.mirror.rackspace.com
elrepo-kernel | 2.9 kB 00:00:00
elrepo-kernel/primary_db | 1.8 MB 00:00:00
Available Packages
kernel-lt.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-devel.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-doc.noarch 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-headers.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-tools.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-lt-tools-libs-devel.x86_64 4.4.176-1.el7.elrepo elrepo-kernel
kernel-ml.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-devel.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-doc.noarch 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-headers.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-tools.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
kernel-ml-tools-libs-devel.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
perf.x86_64 5.0.3-1.el7.elrepo elrepo-kernel
python-perf.x86_64 5.0.3-1.el7.elrepo
安装最新内核
yum --enablerepo=elrepo-kernel install kernel-ml
设置内核
更新内核
grub2-mkconfig -o /boot/grub2/grub.cfg
输出
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.0.3-1.el7.elrepo.x86_64
Found initrd image: /boot/initramfs-5.0.3-1.el7.elrepo.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-957.10.1.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-957.10.1.el7.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-957.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-957.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-5167da7ac6324a6ab3e83847762d2dec
Found initrd image: /boot/initramfs-0-rescue-5167da7ac6324a6ab3e83847762d2dec.img
done
查看系统内核
cat /boot/grub2/grub.cfg |grep menuentry
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
menuentry_id_option=""
export menuentry_id_option
menuentry 'CentOS Linux (5.0.3-1.el7.elrepo.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-5.0.3-1.el7.elrepo.x86_64-advanced-56e38f49-df2a-4a33-833f-90b308aa61de' {
menuentry 'CentOS Linux (3.10.0-957.10.1.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-957.10.1.el7.x86_64-advanced-56e38f49-df2a-4a33-833f-90b308aa61de' {
menuentry 'CentOS Linux (3.10.0-957.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-957.el7.x86_64-advanced-56e38f49-df2a-4a33-833f-90b308aa61de' {
menuentry 'CentOS Linux (0-rescue-5167da7ac6324a6ab3e83847762d2dec) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-5167da7ac6324a6ab3e83847762d2dec-advanced-56e38f49-df2a-4a33-833f-90b308aa61de' {
设置内核
先复制要设置的内核CentOS Linux (5.0.3-1.el7.elrepo.x86_64) 7 (Core)
设置默认内核
grub2-set-default "CentOS Linux (5.0.3-1.el7.elrepo.x86_64) 7 (Core)"
验证
grub2-editenv list
重启电脑
reboot
验证内核
uname -r
输出
5.0.3-1.el7.elrepo.x86_64
参考
http://elrepo.org/tiki/tiki-index.php
https://blog.csdn.net/kikajack/article/details/79396793
https://blog.csdn.net/cacacai/article/details/79727218