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How to Install and Update Kernel via Ubuntu Command Line

By Sourabh /  Category: How To, Ubuntu

Ubuntu users can upgrade Kernel to specific version or they can update Kernel via Ubuntu command line (terminal).

Linux 6.18 Changelog

Linux 6.18 includes support for PSP encryption of TCP connections, a new encryption scheme that shares some similarities with IPsec and TLS but offers superior HW offloads capabilities; it also improves kernel slab memory allocation performance; better swapping performance; significant UDP received performance and scalability improvements; a device mapper target for persistent cache; support managing process Namespaces as file handles similarly to pidfds; support for Accurate Explicit Congestion Notification in TCP; and BPF signed programs. As always, there are many other features, new drivers, improvements and fixes.

Prominent Features

  • Improved kernel memory allocation performance with slub sheaves
  • A device mapper target for persistent cache
  • Process Namespaces as file handles
  • Support for Accurate Explicit Congestion Notification in TCP
  • Add support for PSP encryption of TCP connections
  • Better swapping performance
  • UDP receive performance improvements
  • BPF signed programs
  • More scalable NFS servers by removing caching
  • Introduction of memdesc_flags_t, for a future leaner struct page

Source https://kernelnewbies.org/Linux_6.18

Install Kernel 6.18 in Ubuntu

Before you begin to install kernel in Ubuntu terminal you must update your Ubuntu Linux system. You can run the following commands:

sudo apt update && sudo apt dist-upgrade -

NOTE:

  1. If you are not sure about your CPU architecture type (system architecture), open terminal (Ctrl+Alt+T) and the command uname -m or dpkg –print-architecture, it will then show you your system architecture.
  2. You will have to download AMD64 for most current computers and ARM 64 for ARMv8 CPUs systems.

For example, for For 64-bit architecture, you should download these files:

  • linux-headers-VERSION-NUMBER_all.deb
  • linux-headers-VERSION-NUMBER_amd64.deb
  • linux-image-VERSION-NUMBER_amd64.deb
  • linux-modules-VERSION-NUMBER_amd64.deb

The files can be found at: https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.18/

Once downloaded, run the following set of commands to install the Kernel:

cd /tmp
wget -c https://kernel.ubuntu.com/mainline/v6.18/amd64/linux-headers-6.18.0-061800-generic_6.18.0-061800.202511302339_amd64.deb
wget -c https://kernel.ubuntu.com/mainline/v6.18/amd64/linux-headers-6.18.0-061800_6.18.0-061800.202511302339_all.deb
wget -c https://kernel.ubuntu.com/mainline/v6.18/amd64/linux-image-unsigned-6.18.0-061800-generic_6.18.0-061800.202511302339_amd64.deb
wget -c https://kernel.ubuntu.com/mainline/v6.18/amd64/linux-modules-6.18.0-061800-generic_6.18.0-061800.202511302339_amd64.deb
sudo apt install ./linux-6.18.0.deb

Alternatively you can also use the command sudo dpkg -i *.deb for installing Kernel.

Don’t forget to restart the computer after the installation is complete. To verify your Kernel verison, you can run uname -a command in terminal.