CentOS 7 旧内核仍然活跃

Question

我正在尝试更新 CentOS 内核。我已经运行yum check-update并sudo yum -y update获取最新的软件包和内核。现在它列出了两个内核：

# yum list kernel
Installed Packages
kernel.x86_64                    3.10.0-1062.9.1.el7                installed
kernel.x86_64                    3.10.0-1160.15.2.el7               @updates

我已经尝试重新启动。但是，它仍然显示旧的 3.10.0-1062.9.1.el7 内核处于活动状态。

# uname -r
3.10.0-1062.9.1.el7.x86_64

我尝试查看 grub 但它仍然只列出旧的 3.10.0-1062

# cat /etc/grub2.cfg | grep 3.10
    $linux ($root)//vmlinuz-3.10.0-1062.9.1.el7.x86_64 ${extra_cmdline} net.ifnames=0 biosdevname=0 quiet elevator=noop pti=off nomodeset nofb vga=normal console=tty1 console=ttyS0 console=hvc0 root=UUID=ddac8416-8037-4b93-a480-71c74b7ee6e7 rw
    $initrd ($root)//initramfs-3.10.0-1062.9.1.el7.x86_64.img
    $linux ($root)//vmlinuz-3.10.0-1062.9.1.el7.x86_64 ${extra_cmdline} net.ifnames=0 biosdevname=0 quiet elevator=noop pti=off nomodeset nofb vga=normal console=tty1 console=ttyS0 console=hvc0 root=UUID=ddac8416-8037-4b93-a480-71c74b7ee6e7 rw  ide=nodma apm=off noresume edd=off nomodeset 3
    $initrd ($root)//initramfs-3.10.0-1062.9.1.el7.x86_64.img

我尝试删除“旧”内核但没有成功

package-cleanup --oldkernels --count=1
Failed to set locale, defaulting to C
Loaded plugins: fastestmirror
Not removing kernel 3.10.0-1062.9.1.el7 because it is the running kernel
No old kernels to remove

如何安装/使用这个新内核？

编辑（更多输出）：

# rpm -q kernel
kernel-3.10.0-1062.9.1.el7.x86_64
kernel-3.10.0-1160.15.2.el7.x86_64

# yum install kernel
Failed to set locale, defaulting to C
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * epel: d2lzkl7pfhq30w.cloudfront.net
Package kernel-3.10.0-1160.15.2.el7.x86_64 already installed and latest version
Nothing to do

# ls -l /etc/grub2.cfg
lrwxrwxrwx. 1 root root 22 Mar  2 10:49 /etc/grub2.cfg -> ../boot/grub2/grub.cfg

编辑 （使固定）：我从头开始，更新时注意到以下错误。

grubby fatal error: unable to find a suitable template

以下命令和重新启动应用了新内核

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

归功于https://serverfault.com/questions/673486/grubby-fatal-error-unable-to-find-a-suitable-template