docker在虚拟机中的应用
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl gnupg
sudo install -m 0755 -d /etc/apt/keyrings
curl -fsSL /linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/
sudo chmod a+r /etc/apt/keyrings/
# Add the repository to Apt sources:
echo \
"deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/] /linux/ubuntu \
"$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
sudo tee /etc/apt// > /dev/null
sudo apt-get update