Month: March 2023

Hello,

In this week’s feature highlight, we look at How to Install Linux kernel 6.0 on Ubuntu 22.10

Kernel is central component of an operating system that manages operations of computer and hardware. It basically manages operations of memory and CPU time. It is core component of an operating system. Kernel acts as a bridge between applications and data processing performed at hardware level using inter-process communication and system calls.

Step 1 – Update your system

First, Update the system packages to the latest versions using the below apt commands,

 apt update
 apt upgrade

Install some of the packages required for the Kernel upgrade,

 apt install gcc make perl wget

Step 2 – Installing Linux Kernel 6.0

By default on Ubuntu 22.10, The kernel version it ships with is version 5.19

Linux Kernel 6.0 is not available on Ubuntu 22.10 base repository. So we will manually download the required Linux Kernel packages from the official site and install.

You can check their official site for a list of available kernel versions that can be installed, kernel.ubuntu.com.

At the time of writing this article, version 6.0.9 was the only latest kernel we could install with.

Some points to note, for selecting a different version of kernel.
Open the site kernel.ubuntu.com and scroll to the bottom of the page.
Find a version whose builds are successful, under that, navigate to “amd64” folder.
You will find the required four files to download on the ubuntu system, Linux Headers, Linux Image and Linux Modules.
A successful build looks like below:

Test amd64/build succeeded (rc=0, on=amd64, time=0:12:37, log=amd64/log)
amd64/linux-headers-6.0.9-060009-generic_6.0.9-060009.202211161102_amd64.deb
amd64/linux-headers-6.0.9-060009_6.0.9-060009.202211161102_all.deb
amd64/linux-image-unsigned-6.0.9-060009-generic_6.0.9-060009.202211161102_amd64.deb
amd64/linux-modules-6.0.9-060009-generic_6.0.9-060009.202211161102_amd64.deb

For upgrading to the latest kernel on Ubuntu, follow the given instructions:

wget https//:kernel.ubuntu.com/~kernel-ppa/mainline/v6.0.9/amd64/linux-headers-6.0.9-060009_6.0.9060009.202211161102_all.deb

wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.0.9/amd64/linux-headers-6.0.9-060009-generic-6.0.9060009.202211161102_amd64.deb

wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.0.9/amd64/linux-image-unsigned-6.0.9-060009-generic_6.0.9060009.202211161102_amd64.deb

wget https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.0.9/amd64/linux-modules-6.0.9-060009-generic_6.0.9060009.202211161102_amd64.deb

Now, install the downloaded files using the dpkg command as shown below,

Ensure that there are no other .deb files apart from the ones that were downloaded.
If there are any other .deb files, recommended to remove them before proceeding.

dpkg -i *.deb

After installing the Linux Kernel 6.0, reboot the system to run the new Kernel

reboot

Step 3 – Verify the Kernel version

To verify the kernel installed and running after the reboot, use the uname command as shown below,

uname -r

Output:

root@vps:~# uname -r
6.0.9-060009-generic

This concludes the topic of installing the latest version of Kernel on a Ubuntu System.

Hello,

In this week’s feature highlight, we look at How to Install Docker On Ubuntu 22.10

What is docker?

Docker is basically a container engine that uses the Linux Kernel in order to create containers on top of an operating system. Which is used to create, deploy and run the applications.

Install Docker

Install the docker using the apt package manager.

apt install docker.io docker-compose

Start and enable the docker

systemctl enable --now docker

Check Docker service

systemctl status docker

Output:

root@crown:~# systemctl status docker
● docker.service - Docker Application Container Engine
     Loaded: loaded (/lib/systemd/system/docker.service; enabled; preset: enabl>
     Active: active (running) since Mon 2022-10-17 13:59:05 UTC; 52s ago
TriggeredBy: ● docker.socket
       Docs: https://docs.docker.com
   Main PID: 5778 (dockerd)
      Tasks: 8
     Memory: 22.6M
        CPU: 358ms
     CGroup: /system.slice/docker.service

Create a group called docker,

groupadd docker

To add a user to the docker user group

usermod -aG docker $USER

If you want to add a different user, replace $USER with an existing username.

Check the docker version,

docker --version

Output:

root@crown:~# docker --version
Docker version 20.10.16, build 20.10.16-0ubuntu1

Test docker using the hello-world container.

docker run hello-world

Output:

root@crown:~# docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

Hello,

In this week’s feature highlight, we look at How to Install Webmin on Ubuntu 22.10

Webmin is a web-based dashboard that allows sysadmins to manage Linux and Unix-like systems (especially servers). Webmin allows system administrators to manage user accounts, update packages, system log files, configure firewalls, email, database, postfix, etc.

Installing Webmin on Ubuntu

First, check for any pending system updates.

apt update
apt upgrade

Install the required packages.

apt install apt-transport-https

Import and Add Webmin Repository Key.

wget https://download.webmin.com/jcameron-key.asc

cat jcameron-key.asc | gpg --dearmor >/etc/apt/trusted.gpg.d/jcameron-key.gpg

Install Webmin by running the following command.

apt update
apt install webmin

Start the Webmin by running the below command.

/etc/webmin/start

Output:

Webmin install complete. You can now login to https://vps.server.com:10000/
as root with your root password, or as any user who can use sudo
to run commands as root.

To Configure the Firewall.

ufw allow 10000/tcp

Output:

root@crown:~# ufw allow 1000/tcp
Rules updated
Rules updated (v6)

To access Webmin, open the URL from your web browser: https://IP_address:10000

Note:

1. When logging in for the first time, you will see an ‘invalid SSL’ warning.
2. Simply click on the ‘Advanced’ tab and then ‘Accept the risk and Continue’.

Login to the Webmin web interface using your root user and password.

Once you log in, you will be redirected to the Webmin dashboard.