How to find the docker container directory

Docker is a very popular virtualization platform. Using Docker, applications and the environments they depend on can be packaged into a container for easy deployment and operation. When using Docker, we need to perform some operations on the container, including finding the directory of the container. The following will introduce in detail how to find the Docker container directory.

Part 1 The basic concepts of Docker

Before understanding how to find the Docker container directory, let us first understand some basic concepts of Docker.

Docker image

Docker image is the basis of Docker container. Docker image is composed of multiple file system layers. Each layer represents the execution result of a Docker command. A Docker image can be viewed as a read-only template that can be used to create Docker containers.

Docker container

Docker container is a runnable instance created based on a Docker image. Docker containers have independent file systems, networks, and process spaces.

Docker File System

The file system of the Docker container is superposed by Docker image layers, and each layer can be regarded as an increment. The file system of a Docker container is writable.

Part 2 Docker container directory

When we use Docker to run a container, Docker will convert the Docker image into a container and create a writable data volume (Volume) to save the container The data. This data volume is mounted on the container's file system and can be accessed inside the container.

The directory structure of the Docker container can be divided into two parts, one is the directory inside the container, and the other is the directory on the host (host).

1. Directory inside the container

The directory structure inside the Docker container is similar to the ordinary Linux file system, including the root directory, bin directory, etc directory, tmp directory, usr Catalog etc. These directories function like normal Linux file systems.

If we want to find the directory inside the Docker container, we can use the command docker exec -it <container_id> /bin/bash to enter the container, and use the command ls inside the container to view the directory structure inside the container.

2. Directory on the host

Docker container can mount the directory on the host into the container, thereby realizing the exchange of data inside the container and the data on the host. shared. When we need to find the directory inside the Docker container, we can first find the directory mounted on the host, and then access the directory inside the Docker container through this directory.

If we want to find the directory where the Docker container is mounted, we can use the command docker inspect <container_id> to view the detailed information of the container. In the output information, you can find the host directory where the container is mounted, which corresponds to the root directory inside the container.

Part 3 Summary

Finding the Docker container directory is one of the basic operations of Docker operation. It can provide very necessary help when we need to access or modify files inside the container. Through the introduction of this article, we can understand the basic concepts of Docker container directories and how to find the directory structure of the container inside the container and on the host. I hope this article can be helpful to the work and study of Docker users.

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