Let's talk about how to use Docker in Linux system

With the continuous development of Internet technology, containerization technology has attracted more and more attention. As a popular containerization technology, Docker is widely used in various scenarios. This article will introduce how to use Docker on Linux systems.

1. Install Docker
First you need to install Docker in the Linux system. You can install it through the following command:

Through curl method:

curl -fsSL https://get.docker.com -o get-docker.sh

sudo sh get-docker.sh

Through apt-get method:

sudo apt-get update
sudo apt-get install docker.io

After installation, start the Docker service:

sudo systemctl start docker

2. Using Docker
After installing Docker, we can start using it. The following introduces commonly used Docker commands:

1. Search Docker image

docker search name

2. Pull image

docker pull name

3. Run Docker Container

docker run -it name /bin/bash

where -it represents running an interactive Docker container, name is the name of the image, /bin/bash Indicates the default command to run this container. At this time, you can enter the Docker container to perform operations. Use the exit command to exit the container.

4. View the container list

docker ps -a

5. Enter the Docker container

docker exec -it name /bin/bash

where name is the container name.

6. Delete Docker container

docker rm name

where name is the name of the container.

7. Delete the Docker image

docker rmi name

where name is the name of the image.

3. Dockerfile
Dockerfile is used to define the construction process of the Docker image. The following is an example Dockerfile:

FROM ubuntu:18.04
MAINTAINER name <email>
RUN apt-get update && apt-get install -y build-essential
COPY . /app
WORKDIR /app
RUN make
CMD ["./app"]

This Dockerfile builds an image based on Ubuntu 18.04, installs the necessary tools and components, then compiles the source code in the /app directory, and finally uses ./app Command to start the program.

Execute the build:

docker build -t name .

Among them, name is the name of the built image, and . represents the directory where the Dockerfile is located.

4. Conclusion
This article briefly introduces how to use Docker in Linux systems. In actual use, there are more commands and techniques that need to be mastered. You can refer to the official documentation for in-depth study. Docker's containerization technology can help us quickly deploy and move applications, greatly accelerating the efficiency of development and operation and maintenance.

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