Docker Basic Commands

Docker Basic Commands 

# To start and enable docker 

$ sudo systemctl start docker 

$ sudo systemctl enable docker

# To check docker status 

$ sudo systemctl status docker

# To check docker Version 

$ docker --version

# To see docker info 

$ docker info

# To see docker images

$ docker images

# Pulling hello-world docker image 

$ docker pull hello-world

# To see docker image 

$ docker images

# Running hello-world docker image 

$ docker run hello-world

# Display Running Docker containers

$ docker ps

# Displaying Running + stopped containers

$ docker ps -a

# Inspect docker image

$ docker inspect <image-id>

# Remove Docker image

$ docker rmi <image-name / image-id>

# Remove docker image forcefully

$ docker rmi -f <image-name / image-id>

# Remove docker container

$ docker rm <container-id/container-name>

# To remove all images from the server:

$ docker rmi -f $(docker images -q)

# Remove all stopped containers + un-used images + un-used networks 

$ docker system prune -a

# To see docker images location:

[root@localhost sha256]# pwd

/var/lib/docker/image/overlay2/imagedb/content/sha256

To remove all stopped containers:

$ docker container prune

To start a container using image

[root@localhost sha256]# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE

docker.io/httpd     latest              d1676199e605        13 days ago         145 MB

Using 1 image we can create multiple containers.

docker run -it --name abcd httpd:latest

docker run -it --name abcde httpd:latest

docker run -it -d --name abcdef httpd:latest

docker run -it -d --name abcdefg httpd:latest

-d ------> detacched mode

-i ------> interactive mode

-t ------> tty terminal