Docker is a platform for packaging and shipping applications with all of their dependencies - and running them as lightweight processes (as opposed to virtual machines).
Docker containers run off container images and are managed by the Docker daemon running on the Docker host (either a VM or a physical system).
-
Install Docker first by following these instructions
-
Run a simple interactive container with Debian Linux:
docker run -it --name my_debian debian:stretch bash- When exiting the shell running in the container, the container stops, but stays on the system (see below)
-
Start an Apache web server as a detached container (and map port 8080 on the Docker host to port 80 on the container):
docker run -d --name my_apache -p 8080:80 httpd:2.4-
Try accessing the apache container:
wget -q http://localhost:8080/ -O -
-
-
Check the list of running containers:
docker ps -
Check the list of all containers:
docker ps -a -
Stop the Apache container:
docker stop my_apache -
Remove both of the containers with:
docker rm -v my_debian my_apache -
See list of locally available Docker images:
docker images -
See list of ALL locally available Docker images (including intermediate layers):
docker images -a -
Remove the local images used above:
docker rmi httpd:2.4 debian:stretch
Please see https://github.com/wsargent/docker-cheat-sheet for more examples.