Docker tutorial images are listed in detail

Docker mirror list:

list

Use docker images to display local existing images.

$ sudo docker images
REPOSITORY    TAG   IMAGE ID   CREATED   VIRTUAL SIZE
ubuntu      12.04  74fe38d11401 4 weeks ago 209.6 MB
ubuntu      precise 74fe38d11401 4 weeks ago 209.6 MB
ubuntu      14.04  99ec81b80c55 4 weeks ago 266 MB
ubuntu      latest  99ec81b80c55 4 weeks ago 266 MB
ubuntu      trusty  99ec81b80c55 4 weeks ago 266 MB
...

In listing information, you can see several field information

From which warehouse, such as ubuntu Mirror the tag, such as 14.04 Its ID number (only 1) Creation time Image size

Where the mirror ID has only 1 to identify the mirror, note that ubuntu:14.04 and ubuntu:trusty have the same mirror ID, indicating that they are actually mirror images of the same 1.

The TAG information is used to mark different images from the same warehouse. For example, there are multiple mirrors in the ubuntu repository, and distributions are distinguished by TAG information, such as 10.04, 12.04, 12.10, 13.04, 14.04, and so on. For example, the following command specifies the use of mirror ubuntu:14.04 to start a container.

$ sudo docker run -t -i ubuntu:14.04 /bin/bash

If you do not specify a specific tag, the latest tag information is used by default.

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