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This shows you the differences between two versions of the page.

--- docker:install_docker [2016/10/13 23:56] – created peter
+++ docker:install_docker [2025/05/20 15:43] (current) – peter
@@ Line 1: / Line 1: @@
 ====== Docker - Install Docker ======
+===== Check the kernel version and the OS architecture =====
+Run **uname -a** to check the version of the currently running Linux kernel:
+<code bash>
+uname -a
+</code>
+Check that it's a 64Bit Kernel (x86_64).  Docker won't work without this.
+----
+Check the Ubuntu version.
+<code bash>
+cat /etc/lsb-release
+</code>
+The command shows that the Ubuntu version is 16.04.
+----
+It is recommended to update Ubuntu before you install new software. Run the following command to fetch the latest updates from the Ubuntu repository and install them.
+<code bash>
+sudo apt update
+sudo upgrade
+</code>
+----
+Now install docker with the apt command:
+<code bash>
+sudo apt install -y docker.io
+</code>
+Wait until the installation has been completed.
+----
+===== Add your user to the docker group =====
+<code bash>
+sudo usermod -aG docker $USER
+</code>
+<WRAP info>
+**NOTE:**  This allows docker to be run without using sudo.
+To enable this functionality, log out and log back in; or run: <code bash>
+newgrp docker
+</code>
+</WRAP>
+----
+===== Verify that you can run docker commands without sudo =====
+<code bash>
+docker run hello-world
+</code>
+<WRAP info>
+**NOTE:**  If an error is seen such as **docker: Got permission denied while trying to connect to the Docker daemon socket**, then:
+<code bash>
+sudo chmod 666 /var/run/docker.sock
+</code>
+</WRAP>
+----
+===== Start Docker =====
+<code bash>
+systemctl start docker
+</code>
+----
+===== Enable docker to run at system boot =====
+<code bash>
+systemctl enable docker
+</code>
+----
+===== Check the docker version =====
+<code bash>
+docker version
+</code>
+Show the currently installed Docker version.
+----
+<WRAP info>
+**NOTE:**  docker is now installed.
+  * A container can now be started by downloading a Docker Image from the Docker Registry.
+</WRAP>