#Pull a Docker image
sudo docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
42c077c10790: Pull complete
62c70f376f6a: Pull complete
915cc9bd79c2: Pull complete
75a963e94de0: Pull complete
7b1fab684d70: Pull complete
db24d06d5af4: Pull complete
Digest: sha256:2bcabc23b45489fb0885d69a06ba1d648aeda973fae7bb981bafbb884165e514
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 0e901e68141f 7 days ago 142MB
#Tag an image referenced by Image ID
sudo docker tag 0e901e68141f demo/nginx_img:version1.0
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
demo/nginx_img version1.0 0e901e68141f 7 days ago 142MB
nginx latest 0e901e68141f 7 days ago 142MB
#Tag an image referenced by name
sudo docker tag 0e901e68141f demo/nginx_img:version2.0
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
demo/nginx_img version1.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version2.0 0e901e68141f 7 days ago 142MB
nginx latest 0e901e68141f 7 days ago 142MB
#Tag an image referenced by name and tag
sudo docker tag nginx:latest demo/nginx_img:version3.0.latest
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
demo/nginx_img version1.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version2.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version3.0.latest 0e901e68141f 7 days ago 142MB
nginx latest 0e901e68141f 7 days ago 142MB
#Tag an image for a private repository
sudo docker tag 0e901e68141f myregistry:5000/demo/nginx_img:version4.0
sudo docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
myregistry:5000/demo/nginx_img version4.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version1.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version2.0 0e901e68141f 7 days ago 142MB
demo/nginx_img version3.0.latest 0e901e68141f 7 days ago 142MB
nginx latest 0e901e68141f 7 days ago 142MB
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