Centos7 docker container (1) installation and maintenance

Container installation and maintenance

1. install and configure docker

# Yum install docker

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2. Start the docker daemon process:

# Systemctl start docker
# Systemctl status docker
# Systemctl enable docker

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3. Run the container daemon and test image:

# Docker run Hello-world

You should see the following information:

"Hello from docker. This message shows that your installation appears to be working correctly ."

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4. Basic docker commands:

# Docker info

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# Docker version

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5. List docker commands:

# Docker

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Download a docker image file,Docker Hub

6. Search docker image file command:

# Docker search centos

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7. Download the local image file:

# Docker pull centos

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8. Get the docker Image File

# Docker Image

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9. Remove the docker Image File

# Docker RMI centos

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Run docker containers

The created container is retained in the host file system. You can use the docker RM command to remove it.

10. First, compare the version files. The following example is created previously.

# Docker run Ubuntu CAT/etc/issue

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The preceding command is used as follows:

# Docker run [local image] [command to run into container]

11. To run a container, you must obtain the container ID or name generated by Doker. The following shows the running or stopped containers.
# Docker PS-l

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12. Use the ID to start the container/You can also use the name

# Docker start c629b7d70666

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13. Use the ID to stop the container/You can also use the name

# Docker stop dreamy_mccarthy
# Docker PS

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14. If you forget the container ID, use the -- name option:

# Docker run -- name myname Ubuntu CAT/etc/debian_version

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15. You can use the following name: (start, stop, remove, top, stats ):

# Docker start myname
# Docker stats myname
# Docker top myname

Run interactive sessions

16. Interactive container connection command:

# Docker run-It Ubuntu bash

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-I.
-T lock the terminal to stdin and stdout.
Ubuntu creates an image file for the container.
Bash runs on Ubuntu containers

17. use Ctrl + P and CTRL + Q to exit your container and use docker attach to re-enter the container .:

Do not forget to exit the container with exit

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18. The docker attach Command requires the container ID or name ::

# Docker attach container ID

19. Stop the container and run the kill command on the host:

# Docker kill container ID

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Centos7 docker container (1) installation and maintenance