Docker Basic Command usage explained

Because the service needs to be containerized at work, you have recently started to learn Docker-related knowledge, and the commands commonly used for Docker are summarized as follows:
1. Running the container

$ sudo docker run-i-T Ubuntu/bin/bash

The-I flag guarantees that the stdin in the container is an on-
T flag that tells Docker to assign a pseudo-TTY terminal to the container to be created
Ubuntu means that we create the container using the mirror
/bin/bash means that when the container is created, Docker executes the/bin/bash command in the container

2. Name the container

$ sudo docker run--name my_container  -i-t Ubuntu/bin/bash

--NAME specifies a name for the container, and it is more convenient to use the specified container name than to use the container ID.

3. Restart the stopped container

#使用容器ID启动容器
$ sudo docker start f5a9f05f4214
#使用容器名称启动容器
$ sudo docker start My_container
$ sudo Docker Restart My_container

In addition to the container ID, we can also use the container name to run the container, or you can use the ' Docker restart ' command to restart a container, run the above command, use ' sudo docker ps ' to see that our container has started to run.

4. Attaching to the container

$ sudo docker attach My_container

When the Docker container restarts, it runs with the parameters set by the ' Docker Run ' command, so our container restarts and runs an interactive shell, which can be re-attached to the container's session with the ' Docker attach ' command.
After you run the command, you can press ENTER to enter the session, and if you exit the container's shell, the container will stop running again.

5. Create a daemon container

$ sudo docker run--name my_container-d Ubuntu/bin/bash

The-D flag Docker will put the container in the background running

the ' Docker exec ' command will launch a new process inside the container, and there are two types of processes that can run within the container: background tasks and interactive tasks.

#在容器中运行后台任务
$ sudo docker exec-d my_container touch/etc/new_config_file
#在容器内运行交互式任务
$ sudo docker exec-t- I My_container/bin/bash

6. Stop the daemon container

#通过容器名称停止正在运行的容器
$ sudo docker stop My_container
#通过容器ID停止正在运行的容器
$ sudo docker stop f5a9f05f4214
# Stop container process
$ sudo docker kill f5a9f05f4214

If you want to quickly stop a container, use the ' Docker Kill ' command to send a stop signal to the container. 

7. Automatic restart of the container

$ sudo docker run--restart=always--name my_container-d Ubuntu/bin/bash

The--restart flag checks the container's exit code and, accordingly, decides whether to restart the container, which by default will not restart.
--restart parameter Description
always: Docker restarts the container automatically regardless of the container's exit code.
on-failure: The container's exit code is automatically restarted only if it has a value other than 0. In addition, this parameter accepts an optional restart number parameter, '--restart=on-fialure:5 ' means that Docker will attempt to automatically restart the container, up to 5 times, when the container exit code is not 0 o'clock.

8. Delete a container

#根据容器标识删除容器
$ sudo docker rm my_container 
$ sudo docker rm f5a9f05f4214

If the containers are no longer in use, you can use the ' Docker RM ' command to remove them, or you can remove the running Docker container (Docker 1.6.2+) by passing the-f flag to ' Docker RM '.

#删除所有容器
$ sudo docker rm ' Docker ps-a-Q '

The ' Docker ps ' command lists all of the existing container information that is running-a
flag that represents all containers listed, including the running and stopped-
Q flags indicating that only the container's ID needs to be returned without returning the container's additional information

9. View container Information

 #查看容器信息 $ sudo docker PS #通过docker inspect to get more detailed container information $ sudo docker inspect My_container