ZSH: command not found: docker

If you are trying to run the docker command in a shell and you get the error message "zsh: command not found: docker", it means that the docker command is not installed or not added to the system path. To fix this error, you must install Docker and add the docker command to your system path.

Steps to install Docker

Here are the steps to follow:

1. Install Docker on your system. You can find instructions for installing Docker on different operating systems on the Docker website: https://docs.docker.com/get-docker/.

2. Once Docker is installed, you must add the docker command to your system path. This will allow you to run the docker command from any directory in your shell.

3. The specific steps for adding the docker command to your system path will depend on your operating system and the shell you are using. Here are some general instructions:

• You can add the docker command to your system path using Linux or macOS by modifying your shell's configuration file. For example, if you are using the Bash shell, you can add the following line to your ~/.bashrc file: export PATH="$PATH:/usr/local/bin/docker". Replace /usr/local/bin/docker with your system's path to the docker executable.

• Using Windows, you can add the docker command to your system path by modifying your system environment variables. To do this, open the Control Panel, go to System and Security > System > Advanced System Settings, and then click on the Environment Variables button. In the Environment Variables window, scroll down to the Path variable in the System variables section and click on the Edit button. This will open the Edit environment variable window, where you can add the path to the docker executable on your system.

4. Once you have added the docker command to your system path, you should be able to run the docker command in your shell. To verify that the docker command is working, try running the docker --version command. This should print the version of Docker that is installed on your system.

5. If you are still having trouble running the docker command after following these steps, you may need to log out of your system and log back in or restart your system to apply the changes to your system path. You can also try running the hash -r command in your shell to clear the command cache, which may help if the docker command is not found because the shell uses an outdated cache entry.

What is Docker?

Docker is a platform for building, running, and managing containerized applications. It allows developers to package their applications and dependencies into self-contained units called containers, which can be easily moved and deployed on any system that supports Docker.

Docker provides many benefits, including running applications in a lightweight, isolated environment and running applications on any system that supports Docker, regardless of the underlying operating system or infrastructure. This makes it easy to build, test, and deploy applications quickly and reliably and scale them up or down as needed.

You will need to install the Docker engine on your system to use Docker. This will provide the necessary tools and libraries for building, running, and managing Docker containers. You will also need to know how to use the Docker command line interface (CLI), which is used to interact with the Docker engine and manage containers.

Once you have installed Docker and learned how to use the Docker CLI, you can start building and running Docker containers for your applications. You can also use Docker to manage and deploy your applications in production, using tools and services provided by Docker or third-party vendors.