参看(http://www.googlinux.com/list-all-tags-of-docker-image/index.html)
    参考链接(https://nickjanetakis.com/blog/docker-tip-81-searching-the-docker-hub-on-the-command-line)
    例如，查找 python 关于2.7.15的所有tag.

    1. $ image=python;curl https://registry.hub.docker.com/v1/repositories/$image/tags | sed -e 's/[][]//g' -e 's/"//g' -e 's/ //g' |tr '}' '\n'  | awk -F: '{print $3}'|grep 2.7.15
    2.   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
    3.                                  Dload  Upload   Total   Spent    Left  Speed
    4. 100 36373    0 36373    0     0  22747      0 --:--:--  0:00:01 --:--:-- 22904
    5. 2.7.15
    6. 2.7.15-alpine
    7. 2.7.15-alpine3.4
    8. 2.7.15-alpine3.6
    9. 2.7.15-alpine3.7
    10. 2.7.15-alpine3.8
    11. 2.7.15-alpine3.9
    12. 2.7.15-jessie
    13. 2.7.15-onbuild
    14. 2.7.15-slim
    15. 2.7.15-slim-jessie
    16. 2.7.15-slim-stretch
    17. 2.7.15-stretch
    18. 2.7.15-wheezy
    19. 2.7.15-windowsservercore
    20. 2.7.15-windowsservercore-1709
    21. 2.7.15-windowsservercore-1803
    22. 2.7.15-windowsservercore-1809
    23. 2.7.15-windowsservercore-ltsc2016

    看看 python镜像一共有多少个tag

    1. $ image=python;curl https://registry.hub.docker.com/v1/repositories/$image/tags | sed -e 's/[][]//g' -e 's/"//g' -e 's/ //g' |tr '}' '\n'  | awk -F: '{print $3}'|wc -l
    2.   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
    3.                                  Dload  Upload   Total   Spent    Left  Speed
    4. 100 36373    0 36373    0     0  26167      0 --:--:--  0:00:01 --:--:-- 26205
    5. 856

    这个地址能获得所有tags, (https://registry.hub.docker.com/v1/repositories/image换成你的镜像名字，如 python （https://registry.hub.docker.com/v1/repositories/python/tags）