DevOps Classroom notes 03/Sep/2026

Run container in Docker host

# pull image (download image to local)
docker pull httpd:latest

To run a container we need a port

Types of ports in docker:

1. Static port -p <port to access>:<application port>

Ex: apache application port 80

-p 8080:80

docker images
                                                                 i Info →   U  In Use
IMAGE             ID             DISK USAGE   CONTENT SIZE   EXTRA
demo-ubuntu:1.0   2b4a4d589d5e        157MB         41.6MB
httpd:2.4.68      979c38c2228d        177MB         47.6MB
httpd:latest      979c38c2228d        177MB         47.6MB

docker run -dit –name apache2 -p 8080:80 httpd:latest

Dynamic port

docker run -dit –name tomcat -P tomcat:9.0

Stop and clean containers and images

1. Container commands

docker stop <container id>
docker rm <container id>
docker rm -f <container id>
docker rm -f $(docker ps -a -q)

## Create container
docker create --name tomcat2 -p 8081:8080 tomcat:9.0

## Start container
docker start <container id>

## docker run
docker create + docker start