Kernel updates

After updating the kernel source with portage:

1. Set symlink to new version
   1. eselect kernel list
   2. sudo eselect kernel set <n> (with n the number of the desired kernel version
2. Copy the .config file to the new kernel folder
   1. sudo cp /usr/src/linux-1.2.3-gentoo/.config /usr/src/linux/.config (where 1.2.3 is the currently running kernel version)
3. Update the .config for new items
   1. cd /usr/src/linux
   2. sudo make oldconfig
   3. Adjust new options as needed
4. Build the kernel:
   1. sudo make
   2. sudo make modules_install
   3. sudo make install

See also

• Gentoo wiki docs: https://wiki.gentoo.org/wiki/Kernel/Upgrade

Removing old kernels

1. Identify the kernel version you want to remove (for example, 6.6.58-r1 — sys-kernel/gentoo-sources-6.6.58-r1)
2. Depclean it
   1. sudo emerge -a --depclean gentoo-sources:6.6.58-r1
3. Clean old kernel leftovers
   1. sudo eclean-kernel -n 4
   2. -n 4 is how many of the most recent kernels you want to keep (in this case, keep the 4 newest kernels)

See also

https://wiki.gentoo.org/wiki/Kernel/Removal