# Backup original configuration
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
# You can use sudo cp /etc/apt/sources.list.bak /etc/apt/sources.list to restore

sudo nano /etc/apt/sources.list

deb https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian-security/ bookworm-security main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian-security/ bookworm-security main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-updates main contrib non-free non-free-firmware
deb https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware
deb-src https://mirrors.ustc.edu.cn/debian/ bookworm-backports main contrib non-free non-free-firmware

sudo apt update

sudo apt upgrade -y

# Update packages
sudo apt update

# Set password
passwd

# Enable SSH
sudo apt install openssh-server -y

# Start SSH service
sudo systemctl start ssh

# Set to start on boot
sudo systemctl enable ssh

# Check SSH status
sudo systemctl status ssh

# After the virtual machine is powered off
# Method 1: Directly increase (Recommended)
qemu-img resize your_disk.qcow2 +30G

# Method 2: Set directly to a specific value
# qemu-img resize your_disk.qcow2 30G

# Verify
qemu-img info your_disk.qcow2

fdisk -l /dev/vda

# Install one-click expansion tool
apt install -y cloud-guest-utils

# Then expand partition 1 (corresponds to the partition number above)
growpart /dev/vda 1

# Finally expand the file system
resize2fs /dev/vda1

# resize2fs is only applicable to ext2/ext3/ext4 file systems. If you are using XFS, you need to use: xfs_growfs /

# Update system and install necessary dependencies
sudo apt install -y ca-certificates curl gnupg

# Add Docker official GPG key
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/debian/gpg | \
sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

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

# Install Docker engine and related components
sudo apt install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Start and add to auto-start
sudo systemctl enable docker
sudo systemctl start docker

# Check status
sudo systemctl status docker

# Verify installation success
docker --version
docker compose version

# Xuanyuan's one-click installation script
bash <(curl -fsSL https://xuanyuan.cloud/docker.sh)

# To allow regular users to run Docker commands without typing sudo every time, add the current user to the docker group
sudo usermod -aG docker $USER