bikinibottom/AIServerSetup/01-Ubuntu Server Setup/01-BaseSetup-WebminAndDocker.md

Installing Webmin and Docker on Ubuntu

This guide walks you through installing Webmin on Ubuntu and expanding logical volumes via Webmin’s interface. Additionally, it covers Docker installation on Ubuntu.

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Part 1: Installing Webmin on Ubuntu

Webmin is a web-based interface for managing Unix-like systems, making tasks such as user management, server configuration, and software installation easier.

Step 1: Update Your System

Before installing Webmin, update your system to ensure all packages are up to date.

sudo apt update && sudo apt upgrade -y

Step 2: Add the Webmin Repository and Key

To add the Webmin repository, download and run the setup script.

curl -o setup-repos.sh https://raw.githubusercontent.com/webmin/webmin/master/setup-repos.sh
sudo sh setup-repos.sh

Step 3: Install Webmin

With the repository set up, install Webmin:

sudo apt-get install webmin --install-recommends

Step 4: Access Webmin

Once installed, Webmin runs on port 10000. You can access it by opening a browser and navigating to:

https://<your-server-ip>:10000

If you are using a firewall, allow traffic on port 10000:

sudo ufw allow 10000

You can now log in to Webmin using your system's root credentials.

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Part 2: Expanding a Logical Volume Using Webmin

Expanding a logical volume through Webmin’s Logical Volume Management (LVM) interface is a simple process.

Step 1: Access Logical Volume Management

Log in to Webmin and navigate to:

Hardware > Logical Volume Management

Here, you can manage physical volumes, volume groups, and logical volumes.

Step 2: Add a New Physical Volume

If you've added a new disk or partition to your system, you need to allocate it to a volume group before expanding the logical volume. To do this:

1. Locate your volume group in the Logical Volume Management module.
2. Click Add Physical Volume.
3. Select the new partition or RAID device and click Add to volume group. This action increases the available space in the group.

Step 3: Resize the Logical Volume

To extend a logical volume:

1. In the Logical Volumes section, locate the logical volume you wish to extend.
2. Select Resize.
3. Specify the additional space or use all available free space in the volume group.
4. Click Apply to resize the logical volume.

Step 4: Resize the Filesystem

After resizing the logical volume, expand the filesystem to match:

1. Click on the logical volume to view its details.
2. For supported filesystems like ext2, ext3, or ext4, click Resize Filesystem. The filesystem will automatically adjust to the new size of the logical volume.

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Part 3: Installing Docker on Ubuntu

This section covers installing Docker on Ubuntu.

Step 1: Remove Older Versions

If you have previous versions of Docker installed, remove them:

sudo apt remove docker docker-engine docker.io containerd runc

Step 2: Add Docker's Official GPG Key and Repository

Add Docker’s GPG key and repository to your system’s Apt sources:

sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

echo \
"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
$(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

Step 3: Install Docker

Now, install Docker:

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

Step 4: Post-Installation Steps

To allow your user to run Docker commands without sudo, add your user to the Docker group:

sudo usermod -aG docker $USER
newgrp docker

Test your Docker installation by running the following command:

docker run hello-world

For more information, visit the official Docker installation page.