Docker gives developers the ability to create predictable environments which are isolated from other programs and applications. Docker includes software dependencies needed by the application.<\/p>\n
2. Flexible<\/strong><\/p>\n Docker is very flexible and can be run on any platform or operating systems like MAC, Windows, Linux, virtual machines, production machines, cloud, developer machines and so many more.<\/p>\n Before installing docker you must first check if your system meets the following conditions. To install docker, you need the 64-bit version of any one of these Ubuntu versions:<\/p>\n 1. Ubuntu Jammy 22.04 (LTS) Before you install the new version of docker on your PC, you must make sure that you don\u2019t have any older versions of docker. If at all you do have any, uninstall them using the command shown below:<\/p>\n When you execute the command, the contents of the \/var\/lib\/docker\/, like images, containers, volumes, and networks, are preserved.<\/p>\n Now that we have everything set up, let us get to the matter at hand – installing docker.<\/p>\n The Docker installation package available in the official Ubuntu repository may not always be the latest and most up-to-date version. Therefore, let us install Docker from the official Docker repository, which always has the latest version.<\/p>\n Before we install Docker, update your existing list of packages by using the command \u201csudo apt update\u201d<\/p>\n #image#<\/p>\n After successfully updating your packages, install a few prerequisite packages which let the \u201capt\u201d command use the packages over HTTPS. Use the command shown below:<\/p>\n Add the GPG key for the official Docker repository to your system by using the command shown below:<\/p>\n Now that we are all set, let us add the Docker repository to APT sources by using the command shown below:<\/p>\n Once the installation was successful, update the package with the Docker packages from the newly added repository by using the command \u201csudo apt update\u201d<\/p>\n Now use the command \u201capt-cache policy docker-ce\u201d to check the progress<\/p>\n If you observe carefully, you will notice 2 things:<\/p>\n 1. docker-ce is not installed<\/p>\n 2. The candidate for installation is from the Docker repository for Ubuntu 18.04 (bionic).<\/p>\n Now, for the moment we have all been waiting for – installing Docker! To do so, use the command \u201csudo apt install docker-ce\u201d<\/p>\n Docker is now installed, the daemon has started running and the process is enabled to start on boot you can check is it running or not by using the command shown below:<\/p>\n If you get the output shown above you are good to go!<\/p>\n Voila! We have just installed Docker! Before we call it a day, let us look at a few more installation methods of docker.<\/p>\n Here is another method you can try to install docker on your system, but first, you need to set up the Docker repository, and only after that can you install and update Docker from the repository. So let us look at this procedure step by step.<\/p>\n Before we set up the repository, update your system to finish any pending installs of previous packages using the command \u201csudo apt-get update\u201d<\/p>\n After successfully updating, install the packages to allow apt to use a repository over HTTPS by using the command shown below:<\/p>\n Add the docker official GPG key by using the set of command shown below:<\/p>\n Setup the repository of docker by using the command shown below:<\/p>\n Here is the journey of a Docker container creation to execution, no pun intended!<\/p>\n 1. Docker run command<\/strong><\/p>\n The above command runs a docker command<\/p>\n 2. Docker top command<\/strong><\/p>\n The above command shows you the top processes within a container.<\/p>\n 3. Docker stop command<\/strong><\/p>\n The above command stops an already-running Docker container<\/p>\n 4. Docker remove command<\/strong><\/p>\n The above command deletes an existing container.<\/p>\n 5. Docker statistics command<\/strong><\/p>\n The above command shows the statistics of a running Docker container.<\/p>\n 6. Docker attach command<\/strong><\/p>\n The above command attaches a running Docker container<\/p>\n 7. Docker pause command<\/strong><\/p>\n The above command pauses the process of a running container<\/p>\n 8. Docker unpause command<\/strong><\/p>\n The above command unpauses the processes in a running container.<\/p>\n 9. Docker kill command<\/strong><\/p>\n This command kills the processes in a running Docker container.<\/p>\n You have now learned what docker is, why we use it, how to install it, the life cycle of a docker container, and a few docker commands.<\/p>\n","protected":false},"excerpt":{"rendered":" In this article, we will primarily be focusing on the process of installing Docker, yet we will touch on a few topics like what docker is, docker commands, and a few more interesting topics....<\/p>\n","protected":false},"author":5,"featured_media":111511,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[16964,26876],"class_list":["post-111282","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-docker-container","tag-install-docker-on-ubuntu"],"yoast_head":"\nOS requirements to install docker on Ubuntu<\/h3>\n
\n2. Ubuntu Impish 21.10
\n3. Ubuntu Focal 20.04 (LTS)
\n4. Ubuntu Bionic 18.04 (LTS)<\/p>\nHow to uninstall older versions of docker?<\/h3>\n
sudo apt-get remove docker docker-engine docker.io containerd runc<\/pre>\n
Installing Docker on Ubuntu<\/h3>\n
sudo apt install apt-transport-https ca-certificates curl software-properties-common<\/pre>\n
![\"curl\"](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2023\/01\/curl.webp\")
<\/a><\/p>\ncurl -fsSL https:\/\/download.docker.com\/linux\/ubuntu\/gpg | sudo apt-key add<\/pre>\n
<\/a><\/p>\nsudo add-apt-repository \"deb [arch=amd64] https:\/\/download.docker.com\/linux\/ubuntu bionic stable\"<\/pre>\n
<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\nsudo systemctl status docker<\/pre>\n
<\/a><\/p>\nInstalling Docker using the repository<\/h3>\n
1. Setting up the repository<\/h4>\n
<\/a><\/p>\nsudo apt-get install \\\r\nca-certificates \\\r\ncurl \\\r\ngnupg \\\r\nlsb-release<\/pre>\n
<\/a><\/p>\nsudo mkdir -p \/etc\/apt\/keyrings\r\n$ curl -fsSL https:\/\/download.docker.com\/linux\/ubuntu\/gpg | sudo gpg --dearmor -o \/etc\/apt\/keyrings\/docker.gpg<\/pre>\n
<\/a><\/p>\necho \\\r\n\"deb [arch=$(dpkg --print-architecture) signed-by=\/etc\/apt\/keyrings\/docker.gpg] https:\/\/download.docker.com\/linux\/ubuntu \\\r\n$(lsb_release -cs) stable\" | sudo tee \/etc\/apt\/sources.list.d\/docker.list > \/dev\/null<\/pre>\n
2. Installing the Docker engine<\/h4>\n
<\/a><\/p>\n<\/a><\/h3>\n<\/a><\/h3>\n<\/a><\/h3>\nLifecycle of a Docker container<\/h3>\n
\n
Docker container commands<\/h3>\n
docker run -i -t ubuntu \/bin\/bash<\/pre>\n
docker top <containerID><\/pre>\n
docker stop <containerID><\/pre>\n
docker rm <containerID><\/pre>\n
docker stats <containerID><\/pre>\n
docker attach <containerID><\/pre>\n
docker pause <containerID><\/pre>\n
docker unpause <containerID><\/pre>\n
docker kill <containerID><\/pre>\n
Summary<\/h3>\n