Install Docker

[root@localhost~]# yum install docker

Start docker service

[root@localhost~]# systemctl start docker.service

[root@localhost~]# systemctl enable docker.service

Install Centos images

[root@localhost~]# docker pull centos

Using default tag: latest

Trying to pull repository docker.io/library/centos ...

latest: Pulling from docker.io/library/centos

6bbedd9b76a4: Downloading 2.531 MB/49.87 MB

fc19d60a83f1: Download complete

de413bb911fd: Download complete

2879a7ad3144: Download complete

668604fde02e: Download complete

668604fde02e: Pulling fs layer

Check Centos images setup status

[root@localhost~]# docker images centos

REPOSITORY          TAG                IMAGE ID            CREATED            SIZE

docker.io/centos    latest              980e0e4c79ec        7 weeks ago         196.7 MB

Run a command in a new container

[root@localhost~]# docker  run -i -t centos /bin/bash

[root@bd1a482d44f5 /]#

help

-i, --interactive               Keep STDIN open even if not attached

-t, --tty                            Allocate a pseudo-TTY

PS：“[root@bd1a482d44f5 /]#” ==>  into centos container

Logout container

[root@localhost~]# exit

exit