Docker installation notes
The instructions
Get Docker CE for Ubuntu | Docker Documentation
mitsuaki@ubuntu:~/.vnc$ sudo apt-get remove docker docker-engine docker.io [sudo] password for mitsuaki: Reading package lists... Done Building dependency tree Reading state information... Done Package 'docker-engine' is not installed, so not removed Package 'docker' is not installed, so not removed Package 'docker.io' is not installed, so not removed 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. mitsuaki@ubuntu:~/.vnc$ sudo apt-get update Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB] Get:3 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB] Get:4 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages [409 kB] Reading package lists... Done Building dependency tree Reading state information... Done apt-transport-https is already the newest version (1.2.24). ca-certificates is already the newest version (20170717~16.04.1). curl is already the newest version (7.47.0-1ubuntu2.5). software-properties-common is already the newest version (0.96.20.7). 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. mitsuaki@ubuntu:~/.vnc$ sudo apt-get update Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease Hit:2 http://security.ubuntu.com/ubuntu xenial-security InRelease Hit:3 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease Hit:4 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease Reading package lists... Done mitsuaki@ubuntu:~/.vnc$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - OK mitsuaki@ubuntu:~/.vnc$ sudo apt-key fingerprint 0EBFCD88 pub 4096R/0EBFCD88 2017-02-22 Key fingerprint = 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88 uid Docker Release (CE deb) <docker@docker.com> sub 4096R/F273FCD8 2017-02-22 mitsuaki@ubuntu:~/.vnc$ sudo add-apt-repository \ > "deb [arch=amd64] https://download.docker.com/linux/ubuntu \ > $(lsb_release -cs) \ > stable" mitsuaki@ubuntu:~/.vnc$ sudo apt-get update Hit:1 http://us.archive.ubuntu.com/ubuntu xenial InRelease Hit:2 http://security.ubuntu.com/ubuntu xenial-security InRelease Get:3 https://download.docker.com/linux/ubuntu xenial InRelease [49.8 kB] Hit:4 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease Get:5 https://download.docker.com/linux/ubuntu xenial/stable amd64 Packages [3,150 B] Hit:6 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease Fetched 53.0 kB in 5s (8,832 B/s) Reading package lists... Done mitsuaki@ubuntu:~/.vnc$ sudo apt-get install docker-ce Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: aufs-tools cgroupfs-mount Suggested packages: mountall The following NEW packages will be installed: aufs-tools cgroupfs-mount docker-ce 0 upgraded, 3 newly installed, 0 to remove and 0 not upgraded. Need to get 30.3 MB of archives. After this operation, 149 MB of additional disk space will be used. Do you want to continue? [Y/n] Y Get:1 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 aufs-tools amd64 1:3.2+20130722-1.1ubuntu1 [92.9 kB] Get:2 https://download.docker.com/linux/ubuntu xenial/stable amd64 docker-ce amd64 17.12.0~ce-0~ubuntu [30.2 MB] Get:3 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 cgroupfs-mount all 1.2 [4,970 B] Fetched 30.3 MB in 8s (3,663 kB/s) Selecting previously unselected package aufs-tools. (Reading database ... 217712 files and directories currently installed.) Preparing to unpack .../aufs-tools_1%3a3.2+20130722-1.1ubuntu1_amd64.deb ... Unpacking aufs-tools (1:3.2+20130722-1.1ubuntu1) ... Selecting previously unselected package cgroupfs-mount. Preparing to unpack .../cgroupfs-mount_1.2_all.deb ... Unpacking cgroupfs-mount (1.2) ... Selecting previously unselected package docker-ce. Preparing to unpack .../docker-ce_17.12.0~ce-0~ubuntu_amd64.deb ... Unpacking docker-ce (17.12.0~ce-0~ubuntu) ... Processing triggers for libc-bin (2.23-0ubuntu9) ... Processing triggers for man-db (2.7.5-1) ... Processing triggers for ureadahead (0.100.0-19) ... Processing triggers for systemd (229-4ubuntu21) ... Setting up aufs-tools (1:3.2+20130722-1.1ubuntu1) ... Setting up cgroupfs-mount (1.2) ... Setting up docker-ce (17.12.0~ce-0~ubuntu) ... Processing triggers for libc-bin (2.23-0ubuntu9) ... Processing triggers for systemd (229-4ubuntu21) ... Processing triggers for ureadahead (0.100.0-19) ... mitsuaki@ubuntu:~/.vnc$ sudo ps -aux | grep docker root 15181 0.2 5.0 371404 51480 ? Ssl 09:35 0:00 /usr/bin/dockerd -H fd:// root 15188 0.4 2.3 235292 24232 ? Ssl 09:35 0:00 docker-containerd --config /var/run/docker/containerd/containerd.toml mitsuaki 15380 0.0 0.1 14224 1020 pts/0 S+ 09:38 0:00 grep --color=auto docker mitsuaki@ubuntu:~/.vnc$ docker --version Docker version 17.12.0-ce, build c97c6d6 mitsuaki@ubuntu:~/.vnc$ sudo docker run hello-world Unable to find image 'hello-world:latest' locally latest: Pulling from library/hello-world ca4f61b1923c: Pull complete Digest: sha256:445b2fe9afea8b4aa0b2f27fe49dd6ad130dfe7a8fd0832be5de99625dad47cd Status: Downloaded newer image for hello-world:latest Hello from Docker! This message shows that your installation appears to be working correctly. To generate this message, Docker took the following steps: 1. The Docker client contacted the Docker daemon. 2. The Docker daemon pulled the "hello-world" image from the Docker Hub. (amd64) 3. The Docker daemon created a new container from that image which runs the executable that produces the output you are currently reading. 4. The Docker daemon streamed that output to the Docker client, which sent it to your terminal. To try something more ambitious, you can run an Ubuntu container with: $ docker run -it ubuntu bash Share images, automate workflows, and more with a free Docker ID: https://cloud.docker.com/ For more examples and ideas, visit: https://docs.docker.com/engine/userguide/