Initial Setup
# Change your hostname
sudo hostnamectl set-hostname new_host_name
# Update & upgrade
sudo apt update && sudo apt upgrade -y
Enable Firewall
# Allow ssh service
sudo ufw allow 22/tcp
sudo ufw enable
sudo ufw status
Install Docker
# Add Docker's official GPG key:
sudo apt install ca-certificates curl gnupg lsb-release -y
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
# Add the repository to Apt sources:
sudo tee /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}")
Components: stable
Signed-By: /etc/apt/keyrings/docker.asc
EOF
# Install Docker
sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin -y
# Check installed version
sudo docker --version
sudo docker compose version
# Add user to Docker group
sudo usermod -aG docker your_user_name
newgrp docker
# Test Docker as yourself
docker run hello-world
# Start & enable Docker on reboot
sudo systemctl start docker
sudo systemctl enable docker
Extend root (/) volume
# Check free space in VG:
sudo vgdisplay ubuntu-vg | grep "Free PE"
# Extend your root LV
sudo lvextend -l +100%FREE /dev/mapper/ubuntu--vg-ubuntu--lv
# Resize the filesystem (ext4 example)
sudo resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv
