ubuntu21一键安装docker脚本，亲测可用

#一键安装docker
#/bin/bash
#安装依赖
sudo apt-get install -y ca-certificates curl gnupg lsb_release lrzsz net-tools firewalld wget vim;
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg;
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null;
sudo apt-get update;
#安装docker-运行时
sudo apt-get install docker-ce docker-ce-cli containerd.io;
#启动docker
systemctl start docker;
#阿里云镜像加速
sudo mkdir -p /etc/docker;
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://kugxxgn4.mirror.aliyuncs.com"]
}
EOF;
sudo systemctl daemon-reload;
sudo systemctl restart docker;
#禁用防火墙
sudo systemctl disable firewalld;
#关闭防火墙
sudo systemctl stop firewalld;
#查看docker信息
sudo docker info;

#使用方法：
#复制上方内容保存为docker_install.sh
#命令运行命令行
#chmod 777 docker_install.sh&&sh docker_install.sh