docker is a tool designed to make it easier to create deploy and run applications by using containers.

sudo yum install docker -y

sudo systemctl start docker

docker --version

docker login give the login credentials and password

docker images

docker build -t name (t indicates the tag)

docker pull imagename

docker run -it --name name of the container -p port number image name

example imagename is nginx and container name is c1 need to run on specific port 8000

docker run -it --name c1 -p 8000:8000 nginx (-it indicates run in a interactive mode) you can use -d for detached mode.

docker ps

docker ps -a

docker rmi imagename

docker rm containername / id

docker stop containername/id

FROM ENV RUN ENTRYPOINT ADD WORKDIR EXPOSE USER VOLUME

first you need to tag the image

docker tag name orginalimage name

for ex: i need to make ubuntu offical in my own name you can tag by giving your name

docker tag ubuntu balaubuntu

after the tag the image is created on your own name

to push

docker push balaubuntu.

docker commit conatinername newimagename ex: conatiner is c8 and image is nginx:v2 docker commit c8 nginx:v2