docker login

docker@default:~$ docker login
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: boonyadocker
Password: 
Login Succeeded
docker@default:~$

docker push 注册用户名/镜像名

docker tag boonya/tomcat-allow-remote boonyadocker/tomcat-allow-remote

docker@default:~$ docker images
REPOSITORY             TAG         IMAGE ID      CREATED       SIZE
boonyadocker/tomcat-allow-remote  latest       6137f64875dd    7 hours ago     571MB
boonyadocker/tomcat-web      latest       09677d05b579    2 days ago     571MB
<none>               <none>       e1471ab1845a    3 days ago     188MB
<none>               <none>       cf240e31edfb    3 days ago     188MB
<none>               <none>       717961796ae2    3 days ago     334MB
apptomcat             1.0         249dc3f5dfb0    3 days ago     334MB
tomcat               8          a2fbbcebd67e    8 days ago     334MB
ubuntu               14.04        4a2820e686c4    2 weeks ago     188MB
wurstmeister/kafka         latest       12453f4efa7b    6 weeks ago     265MB
docker@default:~$ 

docker push boonyadocker/tomcat-allow-remote:latest

docker@default:~$ docker push boonyadocker/tomcat-allow-remote:latest
The push refers to a repository [docker.io/boonyadocker/tomcat-allow-remote]
464a44ea0195: Layer already exists 
29b57e33a4da: Pushed 
d649a240e453: Layer already exists 
d0757a6730d0: Layer already exists 
768dcfe5d05f: Layer already exists 
f5cfc06b640d: Layer already exists 
9669d6b73383: Layer already exists 
latest: digest: sha256:1e7562a15ef1728f213922d9633be67f3025447d0a641e333a8ec5107749c386 size: 11802
docker@default:~$

docker@default:~$ docker search boonyadocker/tomcat-allow-remote
NAME                DESCRIPTION                   STARS   OFFICIAL  AUTOMATED
boonyadocker/tomcat-allow-remote  In this Tomcat image server you can use ma...  0          
docker@default:~$

docker pull boonyadocker/tomcat-allow-remote