Ubuntu安装Docker引擎

官方安装手册：https://docs.docker.com/engine/install/ubuntu/

for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done
# Add Docker's official GPG key:
sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc
# Add the repository to Apt sources:
echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt-get update
sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

设置普通用户在不使用sudo命令的情况下可以使用docker命令。

sudo usermod -aG docker $USER || sudo gpasswd -a $USER docker
groups $USER
newgrp docker
docker info

注：之所以使用newgroup刷新组权限，而退出SSH登录会话再登入也无效，依然可能是ssh socket缓存的原因，需要清除 ~/.ssh/sockets/ 目录下对应的 “账户和@主机名:端口号“ 文件。

--