Install and Setup ZFS on Debian 11

The full form of ZFS is Zettabyte File System. The ZFS filesystem is a 128-bit filesystem. The ZFS supported filesystem size is 3×10(to the poer 24) TB. You may never encounter such a big filesystem in real life. The ZFS filesystem was designed to keep and access an insane amount of data.

Enabling Debian contrib Package Repository:

The ZFS filesystem packages are available in the official Debian 11 contrib package repository. The contrib package repository is not enabled on Debian 11 by default. But you can easily enable it from the command-line.

To enable the contrib package repository, open a Terminal and run the following command:

$ sudo apt-add-repository contrib

The official Debian contrib repository should be enabled.

$ sudo apt-get update

Installing ZFS Filesystem Dependencies:

You must install the libraries that the ZFS filesystem kernel module depends on before installing the ZFS filesystem on Debian 11. Continue reading “Install and Setup ZFS on Debian 11” »

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Pushing Docker Images to a Docker Repository

The next logical step after creating a new image from an existing image is to share it with a select few of your friends, the whole world on Docker Hub, or other Docker registry that you have access to. To push an image to Docker Hub or any other Docker registry, you must have an account there.

This section shows you how to push a Docker image to Docker Hub. To learn how to create your own private Docker registry, check out How To Set Up a Private Docker Registry on Ubuntu 14.04.

To push your image, first log into Docker Hub.

docker login -u docker-registry-username

You’ll be prompted to authenticate using your Docker Hub password. If you specified the correct password, authentication should succeed. Continue reading “Pushing Docker Images to a Docker Repository” »

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Docker Commands

Working with Docker Images

Docker containers are built from Docker images. By default, Docker pulls these images from Docker Hub, a Docker registry managed by Docker, the company behind the Docker project. Anyone can host their Docker images on Docker Hub, so most applications and Linux distributions you’ll need will have images hosted there.

To check whether you can access and download images from Docker Hub, type:

docker run hello-world

The output will indicate that Docker in working correctly:

Output
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:41a65640635299bab090f783209c1e3a3f11934cf7756b09cb2f1e02147c6ed8
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.
...

Docker was initially unable to find the hello-world image locally, so it downloaded the image from Docker Hub, which is the default repository. Once the image downloaded, Docker created a container from the image and the application within the container executed, displaying the message. You can search for images available on Docker Hub by using the docker command with the search subcommand. For example, to search for the Ubuntu image, type: Continue reading “Docker Commands” »

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Install Docker on Debain 10

Installing Docker

The Docker installation package available in the official Debian repository may not be the latest version. To ensure we get the latest version, we’ll install Docker from the official Docker repository. To do that, we’ll add a new package source, add the GPG key from Docker to ensure the downloads are valid, and then install the package.

First, update your existing list of packages:

sudo apt update

Next, install a few prerequisite packages which let apt use packages over HTTPS:

sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common

Then add the GPG key for the official Docker repository to your system: Continue reading “Install Docker on Debain 10” »

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Install Lancache on Debian 10

Step 1: Installing Docker

The Docker installation package available in the official Debian repository may not be the latest version. To ensure we get the latest version, we’ll install Docker from the official Docker repository. To do that, we’ll add a new package source, add the GPG key from Docker to ensure the downloads are valid, and then install the package.

First, update your existing list of packages:

sudo apt update

Next, install a few prerequisite packages which let apt use packages over HTTPS:

sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common

Then add the GPG key for the official Docker repository to your system: Continue reading “Install Lancache on Debian 10” »

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