How To Install Docker on Ubuntu 16.04
What is Docker?
Docker is an application that makes it simple and easy to run application processes in a container, which are like virtual machines.What is a Container?
Containers are a way to package software in a format that can run isolated on a shared operating system. Unlike VMs, containers do not bundle a full operating system - only libraries and settings required to make the software work are needed. This makes for efficient, lightweight, self-contained systems and guarantees that software will always run the same, regardless of where it’s deployed.Prerequisites
To follow this tutorial, you will need the following:- 64-bit Ubuntu 16.04 server
Installing Docker
To install docker from official docker repository, add the GPG key for the official Docker repository to the system:$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -Add the Docker repository to APT sources:
$ sudo add-apt-repository “deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable”Next, update the package database with the Docker packages from the newly added repo:
$ sudo apt-get updateNow, install Docker:
$ sudo apt-get install -y docker-ceDocker should now be installed, the daemon started, and the process enabled to start on boot. Check that it’s running:
$ sudo systemctl status dockerThe output should be similar to the following, showing that the service is active and running:
docker.service - Docker Application Container Engine Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled) Active: active (running) since Sun 2016-05-01 06:53:52 CDT; 1 weeks 3 days ago Docs: https://docs.docker.com Main PID: 749 (docker)
Docker Command
With Docker installed and working, now’s the time to become familiar with the command line utility. Using docker consists of passing it a chain of options and commands followed by arguments. The syntax takes this form:$ sudo docker [option] [command] [arguments]To view all available subcommands, type:
$ sudo dockerYou will see the output as follows:
attach Attach to a running container
build Build an image from a Dockerfile
commit Create a new image from a container's changes
cp Copy files/folders between a container and the local filesystem
create Create a new container
diff Inspect changes on a container's filesystem
events Get real time events from the server
exec Run a command in a running container
export Export a container's filesystem as a tar archive
history Show the history of an image
images List images
import Import the contents from a tarball to create a filesystem image
info Display system-wide information
inspect Return low-level information on a container or image
kill Kill a running container
load Load an image from a tar archive or STDIN
login Log in to a Docker registry
logout Log out from a Docker registry
logs Fetch the logs of a container
network Manage Docker networks
pause Pause all processes within a container
port List port mappings or a specific mapping for the CONTAINER
ps List containers
pull Pull an image or a repository from a registry
push Push an image or a repository to a registry
rename Rename a container
restart Restart a container
rm Remove one or more containers
rmi Remove one or more images
run Run a command in a new container
save Save one or more images to a tar archive
search Search the Docker Hub for images
start Start one or more stopped containers
stats Display a live stream of container(s) resource usage statistics
stop Stop a running container
tag Tag an image into a repository
top Display the running processes of a container
unpause Unpause all processes within a container
update Update configuration of one or more containers
version Show the Docker version information
volume Manage Docker volumes
wait Block until a container stops, then print its exit code
$ docker docker-subcommand --help
Thank you.
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