docker常用命令

进入一个正在运行的容器命令：

[root@localhost ~]# docker ps    ###列出正在运行的容器
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS                    NAMES
3212ddd69f38        ubuntu:16.04        "/bin/bash"         35 minutes ago      Up 35 minutes                                agitated_ptolemy
43c1c07316af        training/webapp     "python app.py"     39 minutes ago      Up 39 minutes       0.0.0.0:5000->5000/tcp   admiring_mestorf
[root@localhost ~]# docker exec -it 3212ddd69f38 /bin/bash   ###进入这个id的容器

删除一个镜像：

[root@localhost ~]# docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
docker.io/nginx             latest              f68d6e55e065        3 days ago          109 MB
docker.io/ubuntu            16.04               13c9f1285025        2 weeks ago         119 MB
docker.io/httpd             latest              e77c77f17b46        3 weeks ago         140 MB
docker.io/centos/httpd      latest              2cc07fbb5000        6 months ago        258 MB
docker.io/ubuntu            15.10               9b9cb95443b5        2 years ago         137 MB
docker.io/training/webapp   latest              6fae60ef3446        4 years ago         349 MB
[root@localhost ~]# docker rmi -f 9b9cb95443b5  ##删除指定id的镜像
Untagged: docker.io/ubuntu:15.10
Untagged: docker.io/ubuntu@sha256:02521a2d079595241c6793b2044f02eecf294034f31d6e235ac4b2b54ffc41f3
Deleted: sha256:9b9cb95443b5f846cd3c8cfa3f64e63b6ba68de2618a08875a119c81a8f96698
[root@localhost ~]# docker images
REPOSITORY                  TAG                 IMAGE ID            CREATED             SIZE
docker.io/nginx             latest              f68d6e55e065        3 days ago          109 MB
docker.io/ubuntu            16.04               13c9f1285025        2 weeks ago         119 MB
docker.io/httpd             latest              e77c77f17b46        3 weeks ago         140 MB
docker.io/centos/httpd      latest              2cc07fbb5000        6 months ago        258 MB
docker.io/training/webapp   latest              6fae60ef3446        4 years ago         349 MB
[root@localhost ~]#