docker_usage

1.open and login to ubuntun

docker run -it ubuntu /bin/bash

2.go int alpine for crystal

docker run -it alpine /bin/ash # and do somethings and exit
docker commit -a myth -m 'install crystal' 7d40949fa189 alpine_crystal # save the change to new local image  alpine_crystal

or

docker commit -a 'myth' -m 'install crystal' 19bc5431d047 ilikeorange/alpine-crystal # save the change to new local image  alpine_crystal for push
docker push ilikeorange/alpine-crystal #push the new image to dockerhub

3.cp betweent contain and Host

docker cp 03d0c69f8ed5:/crystal/rr .

4.docker search images by name

docker search alpine 	 # can not get alpine-crystal
docker search alpine-crys # can     get apline-crystal