Working with Docker Containers

Working with Docker Containers

We need an image to start the container. Let's see how we can search images on the Docker registry. A registry holds the Docker images and it can be both public and private. By default, the search will happen on 
the default public registry, which is called Docker Hub and is located at https://hub.docker.com/

Docker client and server version
root@Docker:~# docker version
Client:
 Version:        17.09.0-ce
 API version:  1.32
 Go version:   go1.8.3
 Git commit:   afdb6d4
 Built:             Tue Sep 26 22:42:18 2017
 OS/Arch:       linux/amd64

Server:
 Version:        17.09.0-ce
 API version:  1.32 (minimum version 1.12)
 Go version:   go1.8.3
 Git commit:   afdb6d4
 Built:             Tue Sep 26 22:40:56 2017
 OS/Arch:       linux/amd64
 Experimental: false

Listing/searching for an image
Format : docker search TERM
root@Docker:~# docker search centos

For help with the Docker search, run the following command:
docker search --help

Pulling an image
Format: docker pull NAME[:TAG]

root@Docker:~# docker pull fedora
Using default tag: latest
latest: Pulling from library/fedora
a8ee583972c2: Downloading [=========>                                         ]  16.75MB/86.82MB
..
Image tags group images of the same type. For example, CentOS can have images with tags such as centos5, centos6, and so on. For example, to pull an image with the specific tag, run the following command:
$ docker pull centos:centos7

By default, the image with latest tag gets pulled. To pull all images corresponding to all tags, use the following command:
$ docker pull --all-tags centos

For help with the docker pull use --help