docker: cannot connect to the docker daemon at unix:///var/run/docker.sock. is the docker daemon running?. see 'docker run --help'.

错误信息: "docker: 无法连接到 unix:///var/run/docker.sock 的 docker daemon。docker daemon 是否正在运行？请查看 'docker run --help'。"

意思是 Docker 客户端无法连接到 Docker Daemon 进程，请检查 Docker Daemon 是否正在运行，如果需要帮助请参考 "docker run --help"。

相关问题

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?. See 'docker run --help'.

The error message "Cannot connect to the Docker daemon" usually occurs when the Docker daemon is not running or not accessible. Here are a few steps you can take to troubleshoot this issue:

1. Verify that the Docker daemon is running: You can check the status of the Docker daemon by running the following command in your terminal:

   sudo service docker status

If the daemon is not running, start it using:

   sudo service docker start

2. Make sure you have proper permissions: Ensure that you have sufficient permissions to access the Docker daemon. By default, only root and users in the "docker" group can access it. You can add your user to the "docker" group using the following command:

   sudo usermod -aG docker your_username

3. Verify that Docker is installed correctly: Ensure that Docker is installed properly on your system. You can verify this by running the following command:

   docker version

4. Check if the Docker socket file exists: The error message suggests that Docker is trying to connect to the Unix socket at `/var/run/docker.sock`. Verify if this file exists by running:

   ls -la /var/run/docker.sock

If none of these steps resolve the issue, please provide more details about your setup and any recent changes you made.

Ubuntu 18.04 docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

在Ubuntu 18.04上，当你尝试连接到Docker守护进程时，可能会遇到以下错误消息："Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?"。这个错误通常是由于权限问题引起的。以下是两种解决方法：

1. 使用sudo命令运行Docker命令：

sudo docker ps

这将使用root权限运行Docker命令，因此可以解决权限问题。但是，使用sudo命令需要输入密码，并且不推荐在每个Docker命令前都使用sudo。

2. 将当前用户添加到docker用户组中：

sudo usermod -aG docker $USER

这将将当前用户添加到docker用户组中，该组具有对Docker守护进程的访问权限。然后，您需要注销并重新登录才能使更改生效。