docker_commands

Docker cli commands:
	1. docker ps
	2. docker ps -a
	3. docker images
	4. docker run -dit ubuntu
	5. docker stop <container id>
	6. docker start <container id>
	7. docker pull <image name>
	8. docker tag <docker image id> <dockerhub username>/imagename:firstimage
         a) To login to container --> docker exec -it <conatiner id or name>
          
# docker login
give your docker hub user name and password:
    
	9. docker push <docker hub name>/<docker image name>:firstimage
	
	
	10. docker export <container name>   >    <container name.tar>
	
	

	11. docker search
	12. docker ps
	13. docker kill <container name>
	14. docker commit
	15. docker commit <container name>

	
	16. Docker port binding
       #  docker run --name nginx -d -p 8081:80 nginx
           8081 --> Host port
           80 --> docker container port

      #  docker run --name jenkins -d -p 8082:8080 jenkins/jenkins
     

	17. Docker detached vs foreground.
          #  docker run -it ubuntu /bin/bash
          #  docker run -dit ubuntu /bin/bash

	+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

	Dockerfile instructions:
	
	1. FROM
	2. RUN
	3. COPY
	4. CMD
	5. EXPOSE

Demo: 
# vi Dockerfile

   FROM ubuntu
   CMD [ "echo", "hello world" ]

# docker build .
# docker tag <docker image id>  <dockerhub name>/<docker image name>:tag
  

# docker run --name test <docker image id>


Docker file refernce ---> https://docs.docker.com/reference/dockerfile/