Docker Tutorial For Beginners : Part 1

Many users face issues to get started with Docker. Here is Docker tutorial for beginners. Containers provide a service oriented easy design. Current trend is to use Virtual Machines to run software applications. That is traditional virtualisation. Inside Virtual Machines applications run inside guest Operating System with virtual BIOS, virtual hardware powered by the server’s host OS and of course hardware. So each Virtual Machine has own kernel. Xen, KVM are typical example softwares for virtualization. OpenVZ virtualization uses no separate kernel for the guest OSes and that is why compared with Xen, KVM – Xen KVM versus OpenVZ. You can read about container virtualization and Docker with Linux kernel. You need to know about few concepts around IP address, ports, code dependencies and day to day things sysadmins typical used with. This amount of theory needed to know to use Docker. Rest is on getting started basic guide. With these components Part 1 of our Docker tutorial for beginners guide.

 

Docker Tutorial For Beginners :

 

Take that we are running Ubuntu 16.04 LTS operating system. You should be an user other than root with root privilege :

Of course Docker installation package available in the official repository but may not be at the latest version.To install Docker, we will run :

Then add the Docker repository :

Next we will run some expected commands :

Docker installed and running. If we run :

We will view all available subcommands. Command format of Docker is like :

hello-world is default test application :

We can search for images on Docker Hub by using docker command, to search foo we will run:

Docker Hub will return a list of all images when searched with valid name. We can download foo in this way :

then run a container using it:

To see the images that have been downloaded :

Let us go ahead with foo example Docker Image. If we combine -i and -t we will get interactive shell access into the container as root:

How you’ll use a real example like WordPress? Docker has documents for important images :

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