docker command not found even though installed with apt-get

Question

Adding this for reference for others because it would have saved me 10 minutes if such an answer existed     I tried installing Docker using ubuntu 14 0LTS virtualbox  sudo apt get install docker  However  when I try running docker it gives me the following error  The program  docker  is currently not installed  You can install it by typing  sudo apt-get install docker  Why is ubuntu not seeing docker

User · Answer

sudo apt-get install docker   DO NOT do this   is a different library on ubuntu   Use sudo apt-get install docker-ce to install the correct docker

User · Answer

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  quot docker quot  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  amp  amp  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   Add Dependencies  sudo apt-get update    sudo apt-get install    apt-transport-https    ca-certificates    curl    gnupg-agent    software-properties-common   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   lt docker docker com gt  sub   rsa4096 2017-02-22  S      Setup Repository  sudo add-apt-repository       quot deb  arch amd64  https   download docker com linux ubuntu        lsb release -cs       stable quot    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

User · Answer

IMPORTANT - on ubuntu package docker is something entirely different   avoid it     issue following to view what if any packages you have mentioning docker dpkg -l grep docker  if only match is following then you do NOT have docker installed below is an unrelated package  docker - System tray for KDE3 GNOME2 docklet applications  if you see something similar to following then you have docker installed  dpkg -l grep docker  ii  docker-ce                                  5 19 03 13 3-0 ubuntu-focal         amd64        Docker  the open-source application container engine ii  docker-ce-cli                              5 19 03 13 3-0 ubuntu-focal         amd64        Docker CLI  the open-source application container engine  NOTE - ubuntu package docker io is not getting updates   obsolete do NOT use    Instead do this   install the latest version of docker on linux by executing the following    sudo curl -sSL https   get docker com    sh   sudo curl -sSL https   test docker com   sh    get dev pipeline version     here is a typical output   ubuntu 16 04   apparmor is enabled in the kernel and apparmor utils were already installed   sudo -E sh -c apt-key adv --keyserver hkp   ha pool sks-keyservers net 80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D Executing   tmp tmp rAAGu0P85R gpg 1 sh --keyserver hkp   ha pool sks-keyservers net 80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D gpg  requesting key 2C52609D from hkp server ha pool sks-keyservers net gpg  key 2C52609D   quot Docker Release Tool  releasedocker   lt docker docker com gt  quot  1 new signature gpg  Total number processed  1 gpg          new signatures  1   break   sudo -E sh -c apt-key adv -k 58118E89F3A912897C070ADBF76221572C52609D  gt  dev null   sudo -E sh -c mkdir -p  etc apt sources list d   dpkg --print-architecture   sudo -E sh -c echo deb  arch amd64  https   apt dockerproject org repo ubuntu-xenial main  gt   etc apt sources list d docker list   sudo -E sh -c sleep 3  apt-get update  apt-get install -y -q docker-engine Hit 1 http   repo steampowered com steam precise InRelease Hit 2 http   download virtualbox org virtualbox debian xenial InRelease                                                            Ign 3 http   dl google com linux chrome deb stable InRelease                                                                       Hit 4 http   dl google com linux chrome deb stable Release                                                                         Hit 5 http   archive canonical com ubuntu xenial InRelease                                                                         Hit 6 http   mirror cc columbia edu pub linux ubuntu archive xenial InRelease                                                      Hit 7 http   mirror cc columbia edu pub linux ubuntu archive xenial-updates InRelease                                              Hit 8 http   ppa launchpad net me-davidsansome clementine ubuntu xenial InRelease                                                  Ign 9 http   repo mongodb org apt debian wheezy mongodb-org 3 2 InRelease                                                          Hit 10 http   mirror cc columbia edu pub linux ubuntu archive xenial-backports InRelease                                           Hit 11 http   repo mongodb org apt debian wheezy mongodb-org 3 2 Release                                                           Hit 12 http   mirror cc columbia edu pub linux ubuntu archive xenial-security InRelease                                            Hit 14 http   ppa launchpad net numix ppa ubuntu xenial InRelease                                                                  Ign 15 http   linux dropbox com ubuntu wily InRelease                                                                              Ign 16 http   repo vivaldi com stable deb stable InRelease                                                                         Hit 17 http   repo vivaldi com stable deb stable Release                                                                           Get 18 http   linux dropbox com ubuntu wily Release  6 596 B              Get 19 https   apt dockerproject org repo ubuntu-xenial InRelease  20 6 kB      Ign 20 http   packages amplify nginx com ubuntu xenial InRelease                       Hit 22 http   packages amplify nginx com ubuntu xenial Release Hit 23 https   deb opera com opera-beta stable InRelease Hit 26 https   deb opera com opera-developer stable InRelease Get 28 https   apt dockerproject org repo ubuntu-xenial main amd64 Packages  1 719 B  Hit 29 https   packagecloud io slacktechnologies slack debian jessie InRelease Fetched 28 9 kB in 1s  17 2 kB s  Reading package lists    Done W  http   repo mongodb org apt debian dists wheezy mongodb-org 3 2 Release gpg  Signature by key 42F3E95A2C4F08279C4960ADD68FA50FEA312927 uses weak digest algorithm  SHA1  Reading package lists    Building dependency tree    Reading state information    The following additional packages will be installed    aufs-tools cgroupfs-mount The following NEW packages will be installed    aufs-tools cgroupfs-mount docker-engine 0 upgraded  3 newly installed  0 to remove and 17 not upgraded  Need to get 14 6 MB of archives  After this operation  73 7 MB of additional disk space will be used  Get 1 http   mirror cc columbia edu pub linux ubuntu archive xenial universe amd64 aufs-tools amd64 1 3 2 20130722-1 1ubuntu1  92 9 kB  Get 2 http   mirror cc columbia edu pub linux ubuntu archive xenial universe amd64 cgroupfs-mount all 1 2  4 970 B  Get 3 https   apt dockerproject org repo ubuntu-xenial main amd64 docker-engine amd64 1 11 2-0 xenial  14 5 MB  Fetched 14 6 MB in 7s  2 047 kB s  Selecting previously unselected package aufs-tools   Reading database     427978 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-engine  Preparing to unpack     docker-engine 1 11 2-0 xenial amd64 deb     Unpacking docker-engine  1 11 2-0 xenial      Processing triggers for libc-bin  2 23-0ubuntu3      Processing triggers for man-db  2 7 5-1      Processing triggers for ureadahead  0 100 0-19      Processing triggers for systemd  229-4ubuntu6      Setting up aufs-tools  1 3 2 20130722-1 1ubuntu1      Setting up cgroupfs-mount  1 2      Setting up docker-engine  1 11 2-0 xenial      Processing triggers for libc-bin  2 23-0ubuntu3      Processing triggers for systemd  229-4ubuntu6      Processing triggers for ureadahead  0 100 0-19        sudo -E sh -c docker version Client   Version       1 11 2  API version   1 23  Go version    go1 5 4  Git commit    b9f10c9  Built         Wed Jun  1 22 00 43 2016  OS Arch       linux amd64  Server   Version       1 11 2  API version   1 23  Go version    go1 5 4  Git commit    b9f10c9  Built         Wed Jun  1 22 00 43 2016  OS Arch       linux amd64  If you would like to use Docker as a non-root user  you should now consider adding your user to the  quot docker quot  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   Here is the underlying detailed install instructions which as you can see comes bundled into above technique     Above one liner gives you same as   https   docs docker com engine installation linux ubuntulinux  Once installed you can see what docker packages were installed by issuing dpkg -l grep docker ii  docker-ce                                  5 19 03 13 3-0 ubuntu-focal         amd64        Docker  the open-source application container engine ii  docker-ce-cli                              5 19 03 13 3-0 ubuntu-focal         amd64        Docker CLI  the open-source application container engine  now Docker updates will get installed going forward when you issue sudo apt-get update sudo apt-get upgrade  take a look at  ls -latr  etc apt sources list d  docker  -rw-r--r-- 1 root root 202 Jun 23 10 01  etc apt sources list d docker list save -rw-r--r-- 1 root root  71 Jul  4 11 32  etc apt sources list d docker list   cat  etc apt sources list d docker list  deb  arch amd64  https   apt dockerproject org repo ubuntu-xenial main  or more generally cd  etc apt grep -r docker   sources list d docker list deb  arch amd64  https   download docker com linux ubuntu focal test

User · Answer

SET UP THE REPOSITORY  For Ubuntu 14 04 16 04 16 10 17 04   sudo add-apt-repository  deb  arch amd64         https   download docker com linux ubuntu   lsb release -cs  stable    For Ubuntu 17 10   sudo add-apt-repository  deb  arch amd64  https   download docker com linux ubuntu zesty stable    Add Docker   s official GPG key     curl -fsSL https   download docker com linux ubuntu gpg   sudo apt-key add -   Then install    sudo apt-get update  amp  amp  sudo apt-get -y install docker-ce

[docker] docker command not found even though installed with apt-get

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