![]() $ sudo ln -sf /usr/bin/docker /usr/local/bin/docker Then, update and install the lxc-docker package: ![]() $ sudo sh -c "echo deb docker main > /etc/apt//docker.list" Gpg: key A88D21E9: "Docker Release Tool (releasedocker) " not changedĪdd the Docker repository to our apt sources list: Gpg: requesting key A88D21E9 from hkp server $ sudo apt-key adv -keyserver hkp://:80 -recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9Įxecuting: gpg -ignore-time-conflict -no-options -no-default-keyring -homedir /tmp/tmp.0gMbMUENwN -no-auto-check-trustdb -trust-model always -keyring /etc/apt/trusted.gpg -primary-keyring /etc/apt/trusted.gpg -keyring /etc/apt//nagiosinc-ppa.gpg -keyserver hkp://:80 -recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9 To install the latest version, we need to add the Docker repository key to our local keychain: ![]() Install latest Docker from Ubuntu Package This message shows that your installation appears to be working correctly. Status: Downloaded newer image for hello-world:latest Important: image verification is a tech preview feature and should not be relied on to provide security.ĭigest: sha256:d5fbd996e6562438f7ea5389d7da867fe58e04d581810e230df4cc073271ea52 Library/hello-world:latest: The image you are pulling has been verified. Unable to find image 'hello-world:latest' locally This command downloads a test image and runs it in a container as we can see from the output: The vertical line pipe character before the sh pipes the output from standard output( -o-) to the terminal to the sh command which says to execute the file that was downloaded in the terminal as a program, assuming that the file that was downloaded first has its permissions set to allow executing the file as a program. Then, get the Docker package, and install it from the Docker script: We may want to uninstall the Docker if it's already there: Install using Docker-managed release packages Downloads the package lists from the repositories and "updates" them to get information on the newest versions of packages and their dependencies by synchronizing the package index files fetched from /etc/apt/sources.list. These older versions are known to have bugs which cause data loss and frequently panic under certain conditions.įirst, update our package manager. That's because Kernels older than 3.10 lack some of the features required to run Docker containers. The latest 3.10 minor version or a newer maintained version are also acceptable. To install Docker properly, our kernel must be 3.10 at minimum. Ubuntu (and Debian) contain a much older KDE3/GNOME2 package called docker, so the package and the executable are called docker.io. Ubuntu Trusty comes with a 3.13.0 Linux kernel, and a docker.io package which installs Docker 0.9.1 and all its prerequisites from Ubuntu's repository. Using Docker-managed release packages ensures us get the latest release of Docker.ĭocker requires a 64-bit installation regardless of our Ubuntu version. ![]() In this article, we'll install Docker using Docker-managed release packages as well as Ubuntu managed packages. Containers are like extremely lightweight VMs - they allow code to run in isolation from other containers but safely share the machine's resources, all without the overhead of a hypervisor. Docker is an open-source project that makes creating and managing Linux containers really easy. ![]()
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