How to install Docker in Ubuntu

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Install Docker Engine in Ubuntu

NOTE – All commands you must run as root user or add a current user into a linux group name called “docker”

How to beocme a root?

$ sudo -s

# Update the apt package index and install packages to allow apt to use a repository over HTTPS: $ sudo apt-get update $ sudo apt-get install ca-certificates curl gnupg lsb-release

# Add Docker’s official GPG key:

$ sudo mkdir -p /etc/apt/keyrings $ curl -fsSL | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg

# Use the following command to set up the repository:

$ echo \ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \ $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
root@Jami:/home/jami/Docker# sudo mkdir -p /etc/apt/keyrings
root@Jami:/home/jami/Docker# curl -fsSL | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
root@Jami:/home/jami/Docker# echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker Engine

$ sudo apt-get update 
$ sudo apt-get install docker-ce docker-ce-cli docker-compose-plugin
root@Jami:/home/jami/Docker# sudo apt-get update
Hit:1 jammy InRelease
Get:2 jammy InRelease [48.8 kB]
Hit:3 jammy-updates InRelease
Hit:4 jammy-backports InRelease
Hit:5 jammy-security InRelease
Get:6 jammy/stable amd64 Packages [29.9 kB]
Fetched 78.8 kB in 1s (57.5 kB/s)
Reading package lists... Done
root@Jami:/home/jami/Docker# sudo apt-get install docker-ce docker-ce-cli docker-compose-plugin
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  docker-buildx-plugin docker-ce-rootless-extras git git-man liberror-perl libslirp0 pigz slirp4netns
Suggested packages:
  aufs-tools cgroupfs-mount | cgroup-lite git-daemon-run | git-daemon-sysvinit git-doc git-email git-gui gitk gitweb git-cvs git-mediawiki git-svn
The following NEW packages will be installed: docker-buildx-plugin docker-ce docker-ce-cli docker-ce-rootless-extras docker-compose-plugin git git-man liberror-perl libslirp0 pigz slirp4netns
0 upgraded, 12 newly installed, 0 to remove and 85 not upgraded.
Need to get 124 MB of archives.
After this operation, 451 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 jammy/universe amd64 pigz amd64 2.6-1 [63.6 kB]
Get:2 jammy/stable amd64 amd64 1.6.31-1 [29.8 MB]
Get:3 jammy/main amd64 liberror-perl all 0.17029-1 [26.5 kB]
Get:4 jammy-updates/main amd64 git-man all 1:2.34.1-1ubuntu1.10 [954 kB]
Get:5 jammy-updates/main amd64 git amd64 1:2.34.1-1ubuntu1.10 [3,166 kB]
Get:6 jammy/main amd64 libslirp0 amd64 4.6.1-1build1 [61.5 kB]
Get:7 jammy/universe amd64 slirp4netns amd64 1.0.1-2 [28.2 kB]
Get:8 jammy/stable amd64 docker-buildx-plugin amd64 0.13.1-1~ubuntu.22.04~jammy [29.5 MB]
Get:9 jammy/stable amd64 docker-ce-cli amd64 5:26.0.1-1~ubuntu.22.04~jammy [13.8 MB]
Get:10 jammy/stable amd64 docker-ce amd64 5:26.0.1-1~ubuntu.22.04~jammy [25.1 MB]
Get:11 jammy/stable amd64 docker-ce-rootless-extras amd64 5:26.0.1-1~ubuntu.22.04~jammy [9,319 kB]
Get:12 jammy/stable amd64 docker-compose-plugin amd64 2.26.1-1~ubuntu.22.04~jammy [12.4 MB]
Fetched 124 MB in 10s (13.0 MB/s)
Selecting previously unselected package pigz.
(Reading database ... 209228 files and directories currently installed.)

After the installation is complete, start the Docker service and enable it to start automatically at boot time:

$ sudo systemctl start docker
$ sudo systemctl enable docker
root@Jami:/home/jami/Docker# sudo systemctl start docker
root@Jami:/home/jami/Docker# sudo systemctl enable docker
Synchronizing state of docker.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable docker

Check Docker version

root@Jami:/home/jami/Docker# docker -v
Docker version 26.0.1, build d260a54

Some Docker helpful commands

root@Jami:/home/jami/Docker# docker --help

Usage:  docker [OPTIONS] COMMAND

A self-sufficient runtime for containers

Common Commands:
  run         Create and run a new container from an image
  exec        Execute a command in a running container
  ps          List containers
  build       Build an image from a Dockerfile
  pull        Download an image from a registry
  push        Upload an image to a registry
  images      List images
  login       Log in to a registry
  logout      Log out from a registry
  search      Search Docker Hub for images
  version     Show the Docker version information
  info        Display system-wide information

Management Commands:
  builder     Manage builds
  buildx*     Docker Buildx
  compose*    Docker Compose
  container   Manage containers
  context     Manage contexts
  image       Manage images
  manifest    Manage Docker image manifests and manifest lists
  network     Manage networks
  plugin      Manage plugins
  system      Manage Docker
  trust       Manage trust on Docker images
  volume      Manage volumes

Swarm Commands:
  swarm       Manage Swarm

  attach      Attach local standard input, output, and error streams to a running container
  commit      Create a new image from a container's changes
  cp          Copy files/folders between a container and the local filesystem
  create      Create a new container
  diff        Inspect changes to files or directories on a container's filesystem
  events      Get real time events from the server
  export      Export a container's filesystem as a tar archive
  history     Show the history of an image
  import      Import the contents from a tarball to create a filesystem image
  inspect     Return low-level information on Docker objects
  kill        Kill one or more running containers
  load        Load an image from a tar archive or STDIN
  logs        Fetch the logs of a container
  pause       Pause all processes within one or more containers
  port        List port mappings or a specific mapping for the container
  rename      Rename a container
  restart     Restart one or more containers
  rm          Remove one or more containers
  rmi         Remove one or more images
  save        Save one or more images to a tar archive (streamed to STDOUT by default)
  start       Start one or more stopped containers
  stats       Display a live stream of container(s) resource usage statistics
  stop        Stop one or more running containers
  tag         Create a tag TARGET_IMAGE that refers to SOURCE_IMAGE
  top         Display the running processes of a container
  unpause     Unpause all processes within one or more containers
  update      Update configuration of one or more containers
  wait        Block until one or more containers stop, then print their exit codes

Global Options:
      --config string      Location of client config files (default "/root/.docker")
  -c, --context string     Name of the context to use to connect to the daemon (overrides DOCKER_HOST env var and default context set with "docker context use")
  -D, --debug              Enable debug mode
  -H, --host list          Daemon socket to connect to
  -l, --log-level string   Set the logging level ("debug", "info", "warn", "error", "fatal") (default "info")
      --tls                Use TLS; implied by --tlsverify
      --tlscacert string   Trust certs signed only by this CA (default "/root/.docker/ca.pem")
      --tlscert string     Path to TLS certificate file (default "/root/.docker/cert.pem")
      --tlskey string      Path to TLS key file (default "/root/.docker/key.pem")
      --tlsverify          Use TLS and verify the remote
  -v, --version            Print version information and quit

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