mjhjmtu

I've installed fedora 24 and updated kernel.

$rpm -qa kernel

kernel-4.6.4-301.fc24.x86_64
kernel-4.5.5-300.fc24.x86_64

So kernel-4.6.4-301.fc24.x86_64 is installed.

$uname -r
4.5.5-300.fc24.x86_64

Current loaded kernel.

$ cd /boot
$ ll
total 90117
...
-rwxr-xr-x. 1 root root 6277656 Jul 29 07:09 vmlinuz-0-rescue-60cb3109c1ea41d6806444bff16cc074
-rwxr-xr-x. 1 root root 6277656 May 19 16:21 vmlinuz-4.5.5-300.fc24.x86_64

But there is no file for 4.6.4 kernel.

How is it possible to add newer kernel by hand into grub?

edit grub.conf file if you are using Redhat/ Centos

Copy and edit the old kernel parameter and replace
old parameters and locations with newer one

It's high time that you do

For BIOS

cp /boot/grub2/grub.cfg /boot/grub2/grub.cfg.bak # Creating a backup of current
grub2-mkconfig -o /boot/grub2/grub.cfg

For UEFI

Under EFI, GRUB 2 looks for its configuration in /boot/efi/EFI/fedora/grub.cfg

cp /boot/efi/EFI/fedora/grub.cfg /boot/efi/EFI/fedora/grub.cfg.bak
grub2-mkconfig /boot/efi/EFI/fedora/grub.cfg

Note

if you get

grub2-mkconfig : command not found

that means, you haven't installed the packages that provide these tools (very rare though!), then you need to install them first

dnf install grub2-efi grub2-efi-modules shim

I had the same problem with a clean install of F24, using the default partition layout. On my system /dev/sda1 was created solely for grub that is not normally mounted. To find it I did:

sudo fdisk /dev/sda

and within fdisk p to show the partitions. Next mounted that partition:

sudo mount /dev/sda1 /mnt

looked for the file with:

find /mnt -name grub.cfg

and finally updated the grub.cfg file with:

sudo grub2-mkconfig -o /mnt/EFI/fedora/grub.cfg

This process must be repeated every time the kernel is updated.

Does anyone have a better fix than this? It works, but I don't understand why it is not done automatically. Did I miss a setting somewhere?