docker command not found even though installed with apt-get

The Ubuntu package docker actually refers to a GUI application, not the beloved DevOps tool we’ve come out to look for.

The instructions for docker can be followed per instructions on the docker page here: https://docs.docker.com/engine/install/ubuntu/

=== UPDATED (thanks @Scott Stensland) ===

You now run the following install script to get docker:

`sudo curl -sSL https://get.docker.com/ | sh`
  • Note: review the script on the website and make sure you have the right link before continuing since you are running this as sudo.

This will run a script that installs docker. Note the last part of the script:

If you would like to use Docker as a non-root user, you should now consider
adding your user to the "docker" group with something like:

  `sudo usermod -aG docker stens`

Remember that you will have to log out and back in for this to take effect!

To update Docker run:

`sudo apt-get update && sudo apt-get upgrade`

For more details on what’s going on, See the docker install documentation or @Scott Stensland’s answer below

.

=== UPDATE: For those uncomfortable w/ sudo | sh ===

Some in the comments have mentioned that it a risk to run an arbitrary script as sudo. The above option is a convenience script from docker to make the task simple. However, for those that are security-focused but don’t want to read the script you can do the following:

  1. Add Dependencies
sudo apt-get update; \
sudo apt-get install \
 apt-transport-https \
 ca-certificates \
 curl \
 gnupg-agent \
 software-properties-common
  1. Add docker gpg key

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

(Security check, verify key fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88

$ sudo apt-key fingerprint 0EBFCD88

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) <[email protected]>
sub   rsa4096 2017-02-22 [S]

)

  1. Setup Repository
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
  1. Install Docker
sudo apt-get update; \
sudo apt-get install docker-ce docker-ce-cli containerd.io

If you want to verify that it worked run: sudo docker run hello-world

The following explains why it is named like this: Why install docker on ubuntu should be `sudo apt-get install docker.io`?

Related Posts:

  1. How do I auto-start docker containers at system boot?
  2. Cannot connect to the Docker daemon at unix:/var/run/docker.sock. Is the docker daemon running?
  3. Docker System has not been booted with systemd as init system
  4. Docker error : no space left on device
  5. Error response from daemon: getsockopt: connection refused
  6. How to fix “VirtualBox Interface has active connections” error in Windows?
  7. Docker: How to delete all local Docker images
  8. Docker: How to delete all local Docker images
  9. How to copy files from host to Docker container?
  10. ping: google.com: Temporary failure in name resolution [closed]
  11. How to fix “SSL certificate problem: self signed certificate in certificate chain” error?
  12. How do I pass environment variables to Docker containers?
  13. How to establish ssh key pair when “Host key verification failed”
  14. Error with pre-create check: “VBoxManage not found. Make sure VirtualBox is installed and VBoxManage is in the path”
  15. “OSError: [Errno 8] Exec format error” when trying to run simple flask app in a docker container
  16. denied: requested access to the resource is denied : docker
  17. What is the difference between CMD and ENTRYPOINT in a Dockerfile?
  18. localhost/phpinfo.php
  19. Failed to get D-Bus connection: Operation not permitted
  20. docker push error “denied: requested access to the resource is denied”
  21. How to uninstall Docker completely from a Mac?
  22. After installing with pip, “jupyter: command not found”
  23. gpg: no valid OpenPGP data found
  24. Where are Docker images stored on the host machine?
  25. How to force Docker for a clean build of an image
  26. Can’t connect to docker from docker-compose
  27. gpg: no valid OpenPGP data found
  28. Docker error: invalid reference format: repository name must be lowercase
  29. Docker for Windows error: “Hardware assisted virtualization and data execution protection must be enabled in the BIOS”
  30. standard_init_linux.go:178: exec user process caused “exec format error”
  31. list all globally installed modules with one command in ubuntu
  32. E: Unable to locate package mongodb-org
  33. How to open the terminal in Atom?
  34. Valgrind permission denied on file
  35. ImportError: libGL.so.1: cannot open shared object file: No such file or directory
  36. docker error : the input device is not a TTY. If you are using mintty, try prefixing the command with ‘winpty’
  37. Docker: unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx
  38. docker: “build” requires 1 argument. See ‘docker build –help’
  39. How to install Boost on Ubuntu
  40. How to verify if nginx is running or not?
  41. build context for docker image very large
  42. Docker – Name is already in use by container
  43. How to add RSA key to authorized_keys file?
  44. Docker: How to clear the logs properly for a Docker container?
  45. Docker hv-sock proxy (vsudd) is not reachable windows
  46. Why does “docker attach” hang?
  47. MySQL: How to reset or change the MySQL root password?
  48. Removing all installed OpenCV libs
  49. Running docker container : iptables: No chain/target/match by that name
  50. Vim: No write since last change, even though I changed the file 
  51. Why can’t I print to terminal with my python script?
  52. how to search for a directory from the terminal in ubuntu
  53. kubectl get pods shows ErrImagePull
  54. Change directory command in Docker?
  55. Docker container will automatically stop after “docker run -d”
  56. How to search images from private 1.0 registry in docker?
  57. Docker compose, running containers in net:host
  58. Where is the Docker daemon log?
  59. whats the meaning of curl “-s” and “-m”
  60. bitnami/WordPress chart – embed uploads in a custom image
  61. WP in Docker – cannot install plugin or upgrade WP
  62. Run WP-CLI using PHP
  63. Can’t install local plugin (zip) with wp-cli [closed]
  64. Implement ssl to a WP docker container [closed]
  65. Docker compose with wordpress:cli-php7.4 stalls on ‘The site you have requested is not installed’?
  66. WordPress on Docker: how to update website/plugin?
  67. WordPress development using Docker – how to share directories? [closed]
  68. wp-admin Redirects to Docker Container Name
  69. What is the best way to install a WordPress starter theme into a Docker environment?
  70. How to update wp-config file in Docker
  71. Custom location for attached images
  72. ERROR: No such service: nginx when building wordpress with docker [closed]
  73. wp-admin remove part of the url
  74. Install with docker – can’t access port
  75. Debugging high CPU usage during periods of inactivity
  76. How and where are the provisioning script set up in WordPress?
  77. WordPress docker with empty responses to HTTP requests
  78. Should I use docker in wordpress production?
  79. IP addresses to block to stop WP auto-update?
  80. New wordpress keep redirecting to localhost/wp-admin/install.php
  81. Configuring Xdebug with docker compose
  82. WordPress REST API not working on localhost
  83. Duplicator Pro plugin with Docker on local?
  84. How to queue API requests with PHP in WordPress?
  85. WordPress /wp-admin redirect to wrong port in docker
  86. WordPress docker page is missing VIRTUAL_HOST variable
  87. Too many redirects error when change of base url
  88. Dockerized WordPress is having Nginx Proxy Issues
  89. How to remove an image tag in Docker without removing the image itself?
  90. How to view all ssl certificates in a bundle?
  91. How do I reattach to Ubuntu Server’s ‘do-release-upgrade’ process?
  92. Can Mac OS X be run inside Docker? [closed]
  93. Which ports do I need to open in the firewall to use NFS?
  94. dpkg-reconfigure: unable to re-open stdin: No file or directory
  95. Multiple commands in Docker CMD directive
  96. Make a Docker application write to stdout
  97. Automate the installation of postfix on Ubuntu
  98. Why isn’t ifconfig available in Ubuntu Docker container?
  99. Trouble Finding Error Logs in wp-env
  100. Setup existing WordPress site for local development and testing using docker

Leave a Comment

error code: 523