linux系统升级内核版本

升级linux内核

下载内核源

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm

安装最新版本内核

yum --enablerepo=elrepo-kernel install -y kernel-lt

查看可用内核

[root@node ~]# 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 (4.4.238-1.el7.elrepo.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-1062.el7.x86_64-advanced-0f0f985c-c7c0-4252-bd28-ef7ed495c8bd' { menuentry 'CentOS Linux (3.10.0-1062.el7.x86_64) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-3.10.0-1062.el7.x86_64-advanced-0f0f985c-c7c0-4252-bd28-ef7ed495c8bd' { menuentry 'CentOS Linux (0-rescue-2da75a04ef4347d9b56e6238d8c7af52) 7 (Core)' --class centos --class gnu-linux --class gnu --class os --unrestricted $menuentry_id_option 'gnulinux-0-rescue-2da75a04ef4347d9b56e6238d8c7af52-advanced-0f0f985c-c7c0-4252-bd28-ef7ed495c8bd' {

设置开机从新内核启动

[root@node ~]# grub2-set-default "(4.4.238-1.el7.elrepo.x86_64) 7 (Core)"

查看内核启动项

[root@node ~]# grub2-editenv list saved_entry=(4.4.238-1.el7.elrepo.x86_64) 7 (Core)

重启系统使内核生效

reboot

查看内核版本是否生效

uname -r