- \n
- 4GB RAM for Virtual Machines<\/li>\n
- 64-bit Kernel<\/li>\n
- GNOME Desktop Environment<\/li>\n<\/ul>\n
How to Install and Use Docker Containers on Ubuntu 22.04<\/strong><\/h2>\n
Docker containers can be used on Ubuntu for deploying, scaling, and testing applications. With the terminal in Ubuntu, Docker can easily be installed by following the steps explained below.<\/p>\n
Step 1: Update & Upgrade Existing Packages<\/strong><\/h3>\n
Use the Update and Upgrade Commands to make your Ubuntu system Up-to-date with the latest packages. The update command will check for available updates:<\/p>\n
sudo<\/span> apt-get update<\/span><\/div><\/div>\n![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-1.png\")
<\/p>\nTo upgrade the packages, the command used is:<\/p>\n
sudo<\/span> apt-get upgrade<\/span><\/div><\/div>\n![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-2.png\")
<\/p>\nStep 2: Download Docker<\/strong><\/h3>\n
Before installing Docker, ensure the \u201cca-certificates<\/strong>\u201d, \u201ccurl<\/strong>\u201d, and \u201csoftware-properties-common<\/strong>\u201d packages are already installed using the command:<\/p>\n
sudo<\/span> apt install<\/span> apt-transport-https ca-certificates curl software-properties-common<\/div><\/div>\n![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-3.png\")
<\/p>\nNow, add the Docker GPG Key <\/strong>to your system. The GPG Key will ensure the authenticity of the Docker Packages when being installed.<\/p>\n
curl -fsSL<\/span> https:\/\/<\/span>download.docker.com\/<\/span>linux\/<\/span>ubuntu\/<\/span>gpg |<\/span> sudo<\/span> gpg --dearmor<\/span> -o<\/span> \/<\/span>usr\/<\/span>share\/<\/span>keyrings\/<\/span>docker-archive-keyring.gpg<\/div><\/div>\nThe command line moves to the next line indicating the GPG Key was added:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-4.png\")
<\/p>\nAfter adding the GPG Key, add the Docker Repository using the command:<\/p>\n
echo<\/span> \\ "deb [arch=$(dpkg --print-architecture)<\/span> signed-by=\/etc\/apt\/keyrings\/docker.gpg] https:\/\/download.docker.com\/linux\/ubuntu \\ $(lsb_release -cs)<\/span> stable"<\/span> |<\/span> sudo<\/span> tee<\/span> \/<\/span>etc\/<\/span>apt\/<\/span>sources.list.d\/<\/span>docker.list ><\/span> \/<\/span>dev\/<\/span>null<\/div><\/div>\nThe command line moves to the next line indicating the repository was added:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-5.png\")
<\/p>\nUpdate the Ubuntu system again to add the changes:<\/p>\n
sudo<\/span> apt update<\/div><\/div>\n![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-6.png\")
<\/p>\nOnce the system updates, verify the available Docker Versions using the command:<\/p>\n
apt-cache policy<\/span> docker-ce<\/div><\/div>\nAs you can see the Docker is not installed yet:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-7.png\")
<\/p>\nNow install Docker using the command:<\/p>\n
sudo<\/span> apt install<\/span> docker-ce<\/div><\/div>\nConfirmation will be asked during the installation, Continue by entering \u201cY\u201d:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-8.png\")
<\/p>\nOnce downloaded, check if the Docker is running using the command:<\/p>\n
sudo<\/span> systemctl status docker<\/div><\/div>\nYou will see the Docker is active and is Running:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-9.png\")
<\/p>\nNow, to view information about Docker installed on your Ubuntu system, use the command:<\/p>\n
docker info<\/div><\/div>\nThis will display the version and additional information about the Docker installed on your Ubuntu system:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-10.png\")
<\/p>\nStep 3: Using Docker Images<\/strong><\/h3>\n
Docker containers are made of Docker Images and you can use Docker by running commands with arguments having the syntax:<\/p>\n
docker <<<\/span>strong><\/span>option<\/<\/span>strong>><\/span> <<<\/span>strong><\/span>command<\/span><\/<\/span>strong>><\/span> <<<\/span>strong><\/span>arguments<\/<\/span>strong>><\/span><\/div><\/div>\nThe Docker Images are available on Docker Hub and by using the \u201csearch\u201d command with docker, images can be searched on the Docker Hub. In our case, to search for \u201cubuntu\u201d related images, the command used is:<\/p>\n
sudo<\/span> docker search ubuntu<\/div><\/div>\nThe Official Column with \u201c[OK]\u201d means the images are made officially by the company:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-11.png\")
<\/p>\nThe \u201cubuntu\u201d image is present and can now be downloaded using the \u201cpull\u201d command:<\/p>\n
sudo<\/span> docker pull ubuntu<\/div><\/div>\nThis will download the \u201cubuntu\u201d image from the Terminal:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-12.png\")
<\/p>\nOnce downloaded, the image will be extracted and can be verified using the command:<\/p>\n
sudo<\/span> docker images<\/div><\/div>\nThe images downloaded and extracted will be shown, in our case, \u201cubuntu\u201d:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-13.png\")
<\/p>\nStep 4: Running Docker Container<\/strong><\/h3>\n
To run a Docker Container, the \u201crun\u201d command is used and the container should be accessed before running it. The \u201ci\u201d and \u201ct\u201d switches in combination provide us the ability to access containers. Considering our previous steps where we installed the \u201cubuntu\u201d docker image, can be used as a container. To use the \u201cubuntu\u201d image as a container, the command used is:<\/p>\n
sudo<\/span> docker run -it<\/span> ubuntu<\/div><\/div>\nThe command line will change to the container ID:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-14.png\")
<\/p>\nThe \u201cc9a64 a410738\u201d is the Container ID of the \u201cubuntu\u201d container. Inside the container, any command can be executed as well and any program can be installed. Before installing any packages inside the container, ensure to update the container using the command:<\/p>\n
apt update<\/div><\/div>\n![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-15.png\")
<\/p>\nTo install \u201cvlc\u201d inside the container, the command used will be:<\/p>\n
apt install<\/span> vlc<\/div><\/div>\nThis will start downloading \u201cvlc\u201d:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-16.png\")
<\/p>\nOnce downloaded and installed, the command prompt or terminal will inform the successful installation:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-17.png\")
<\/p>\nTo exit from the Container, use the \u201cexit\u201d command in the command line:<\/p>\n
exit<\/span><\/div><\/div>\nThis will exit the container and the command line will confirm by showing the regular user in the terminal:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-18.png\")
<\/p>\nBonus Step: Managing Docker Containers<\/strong><\/h2>\n
To view the active and inactive docker containers running on your Ubuntu system, use the command:<\/p>\n
sudo<\/span> docker ps<\/span> -a<\/span><\/div><\/div>\nAll containers are displayed in the CLI, the status column displays if the container is active or inactive:<\/p>\n
![](\"http:\/\/linuxways.net\/wp-content\/uploads\/2023\/10\/word-image-22010-19.png\")
<\/p>\nThis is how you can install, create, and manage a Docket Container on Ubuntu.<\/p>\n
Conclusion<\/strong><\/h2>\n
Docker Containers can deliver efficient software in Ubuntu and can be installed by adding the Docker GPG Key, adding the Docker Repository, and then installing the Docker Engine. Once installed the status can be checked and with the \u201crun\u201d command, Containers can be used. This article explained the installation and creation of a Docker Image Container.<\/p>","protected":false},"excerpt":{"rendered":"
Docker can be installed by adding the Docker GPG Key, adding the Docker Repository, downloading the Image, and then installing the Docker Engine. <\/p>","protected":false},"author":110,"featured_media":22030,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-22010","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ubuntu"],"_links":{"self":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/22010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/users\/110"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/comments?post=22010"}],"version-history":[{"count":0,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/posts\/22010\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media\/22030"}],"wp:attachment":[{"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/media?parent=22010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/categories?post=22010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxways.net\/de\/wp-json\/wp\/v2\/tags?post=22010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}