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(https://stackoverflow.co/labs/)   Learn more about Labs   (https://cdn.sstatic.net/Sites/stackoverflow/Img/apple-touch-icon.png?v=c78bd457575a) (/questions/56305613/cant-add-user-to-docker-group) Can't add user to docker group  (/questions/ask) Ask Question     (2019-05-25 14:13:34Z) Asked 5 years, 3 months ago  Modified (?lastactivity) (2024-07-16 11:14:02Z) 1 month ago  (Viewed 89,806 times) Viewed 90k times         This question shows research effort; it is useful and clear  (70:3:31e,16:ef8a10de28b8be13,10:1725173908,16:997c63e53d05268b,8:56305613,3b9e858e792319d9aa31defe241fb5ff656fceb08e4789893dd38d159748ca14) 38  (This question does not show any research effort; it is unclear or not useful)    (70:3:31e,16:dbe99adfdd54a0ec,10:1725173908,16:9d7fe45f3b58b681,8:56305613,8da02b0477d33bdefe4d3c08f294ffc8207d66e401dcf59c3922bc37f16791e9)      Save this question.  (/posts/56305613/timeline)    Show activity on this post.    I'm trying to set docker up on a new system, and when running docker info I get: docker -v
=> Docker version 18.09.5, build e8ff056

docker info
=> Got permission denied while trying to connect to the Docker daemon
   socket at unix:///var/run/docker.sock: Get
   http://%2Fvar%2Frun%2Fdocker.sock/v1.39/info: dial unix 
   /var/run/docker.sock: connect: permission denied   Following the docs, I've tried: sudo usermod -a -G docker $USER   Which returns no output. When I then run groups: groups
=> mark adm cdrom sudo dip plugdev lpadmin sambashare   I can see a docker group exists: less /etc/group | grep docker
=> docker:x:131:mark   And can see that it owns a socket running where the error message states: ls -la /var/run/ | grep docker
=> 
drwx------  5 root                root                 120 May 25 14:54 docker
-rw-r--r--  1 root                root                   5 May 25 14:54 docker.pid
srw-rw----  1 root                docker                 0 May 25 14:54 docker.sock   So why can't I add myself to that group with sudo usermod -a -G docker $USER ?  (/questions/tagged/linux) (show questions tagged 'linux') linux  (/questions/tagged/ubuntu) (show questions tagged 'ubuntu') ubuntu  (/questions/tagged/usergroups) (show questions tagged 'usergroups') usergroups      (/q/56305613) (Short permalink to this question) Share  Share a link to this question     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/56305613/edit) () Improve this question  Follow (70:3:31e,16:9e981faa190d7163,10:1725173908,16:d7d5a3b83cd23ec4,8:56305613,e30f29a04d595273649f55a87a132dd7583cd63789dc49934c241bfeec276aac)  Follow this question to receive notifications       (/posts/56305613/revisions) (show all edits to this post) edited (2024-06-20 23:18:41Z) Jun 20 at 23:18    (/users/7123660/benjamin-loison) (Benjamin Loison's user avatar)    (/users/7123660/benjamin-loison) Benjamin Loison (reputation score) 5,536 (4 gold badges)  4  4 gold badges (18 silver badges)  18  18 silver badges (37 bronze badges)  37  37 bronze badges     asked (2019-05-25 14:13:34Z) May 25, 2019 at 14:13   (/users/6535997/mark) (Mark's user avatar)    (/users/6535997/mark) Mark Mark (reputation score) 6,336 (5 gold badges)  5  5 gold badges (23 silver badges)  23  23 silver badges (50 bronze badges)  50  50 bronze badges        4 (number of 'useful comment' votes received) 11   I believe you need to login/restart for the changes to be completed. – (/users/7925098/omari-celestine) (1,435 reputation) Omari Celestine  Commented (2019-05-25 14:18:29Z, License: CC BY-SA 4.0) May 25, 2019 at 14:18      (number of 'useful comment' votes received) 1   Your belief is correct, thanks! – (/users/6535997/mark) (6,336 reputation) Mark  Commented (2019-05-25 14:34:41Z, License: CC BY-SA 4.0) May 25, 2019 at 14:34        On Ubuntu 20.04, in my case, "login/restart" literally meant I needed to _reboot_ for the changes to take effect, not merely restart the bash session. Wowzers. – (/users/1286760/4z4t4r) (2,418 reputation) 4Z4T4R  Commented (2021-02-20 23:58:52Z, License: CC BY-SA 4.0) Feb 20, 2021 at 23:58        One gotcha to watch for is that you run groups to check if you've been added to the docker group whereas you probably need to run groups $USER . This is since according to man groups "if no USERNAME is specified, [groups will display groups] for the current process (which may differ if the groups database has changed)" – (/users/6619692/anil) (1,294 reputation) Anil  Commented (2023-01-17 14:04:37Z, License: CC BY-SA 4.0) Jan 17, 2023 at 14:04        (Use comments to ask for more information or suggest improvements. Avoid answering questions in comments.) Add a comment |  (Expand to show all comments on this post)          6 Answers 6   Sorted by:  (/questions/56305613/cant-add-user-to-docker-group?answertab=scoredesc#tab-top) Reset to default   (scoredesc) Highest score (default)  (trending) Trending (recent votes count more)  (modifieddesc) Date modified (newest first)  (createdasc) Date created (oldest first)            This answer is useful  (70:3:31e,16:2b2ccb1637758917,10:1725173908,16:970ea669ad897e48,8:57867754,76166f1d0cef52b448bbc622fe30cefcfbca95e9d6669280b99bbcd0f5797348) 52  (This answer is not useful)    (70:3:31e,16:4176e477590865ca,10:1725173908,16:7d87efbd85597bc7,8:57867754,2dc63f1eb8d1cf85954b8aef1384b0319f8e70f202f0da86e2242a732dc69a28)      Save this answer.  (Loading when this answer was accepted…)     (/posts/57867754/timeline)    Show activity on this post.    You need to reload your shell in order to make the changes take effect.
Often you need to reboot your shell process and possibly even restart your computer. e.g sudo usermod -aG docker $USER sudo reboot   See @4Z4T4R answer and give a thumbs (https://stackoverflow.com/a/66297855/7961500) https://stackoverflow.com/a/66297855/7961500  Load changes without quitting your shell To avoid starting a new shell you can run. (Doesn't seem to work for all environments) exec su -l $USER  This will create a new subshell with the loaded changes and replace your current shell with it. If you need it to work now without restarting your computer Another way if you just need to get it working now, is to change your primary group. This is only a temp solution as with any new shell you will need to apply it again. export my_group=$(id -gn)
newgrp docker
newgrp $my_group   Documentation You can also look at the offical documentation here (https://docs.docker.com/engine/install/linux-postinstall/) https://docs.docker.com/engine/install/linux-postinstall/    (/a/57867754) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/57867754/edit) () Improve this answer  Follow (70:3:31e,16:01835ac0c71a0762,10:1725173908,16:00c329bb1df1989a,8:57867754,7933790ed8f2e4a752711a818f69479e1171ee8cbb0ed6fc88383f2d1cd31116)  Follow this answer to receive notifications       (/posts/57867754/revisions) (show all edits to this post) edited (2024-06-20 23:18:26Z) Jun 20 at 23:18    (/users/7123660/benjamin-loison) (Benjamin Loison's user avatar)    (/users/7123660/benjamin-loison) Benjamin Loison (reputation score) 5,536 (4 gold badges)  4  4 gold badges (18 silver badges)  18  18 silver badges (37 bronze badges)  37  37 bronze badges     answered (2019-09-10 09:23:35Z) Sep 10, 2019 at 9:23   (/users/7961500/louis-stekhoven-smith) (Louis Stekhoven-Smith's user avatar)    (/users/7961500/louis-stekhoven-smith) Louis Stekhoven-Smith Louis Stekhoven-Smith (reputation score) 1,119 (14 silver badges)  14  14 silver badges (10 bronze badges)  10  10 bronze badges        5 (number of 'useful comment' votes received) 3   restarting the shell did not work for me, but newgrp docker did. Any idea why that would happen? – (/users/2903532/reynoldsnlp) (1,200 reputation) reynoldsnlp  Commented (2020-08-11 21:38:21Z, License: CC BY-SA 4.0) Aug 11, 2020 at 21:38      (number of 'useful comment' votes received) 2   Same issue here on ubuntu 20.04, newgrp docker seemed to work for me. sudo usermod -a -G docker $USER seemed to work periodically, but after reboot the group was lost. – (/users/24718/monkut) (43,466 reputation) monkut  Commented (2020-08-12 08:53:19Z, License: CC BY-SA 4.0) Aug 12, 2020 at 8:53   (this comment was edited 1 time)        (number of 'useful comment' votes received) 1   Exactly the same problem on Ubuntu 19.10, for me only newgrp docker fixes it, but it's not persistent – (/users/424150/chuckatron) (186 reputation) Chuckatron  Commented (2020-09-09 20:51:27Z, License: CC BY-SA 4.0) Sep 9, 2020 at 20:51      (number of 'useful comment' votes received) 3   The newgrp command is very different from usermod -aG GROUP USER : the latter adds group GROUP to USER, without changing the primary group of USER; the newgrp creates a new shell and in that shell, the USER's primary group changes to GROUP! This is not likely the desired effect: the OP still wants files created by USER to belong to user's primary GROUP, but wants files owned by GROUP to be accessible by USER. Very completely different. – (/users/869951/oliver) (28,989 reputation) Oliver  Commented (2021-02-06 14:48:11Z, License: CC BY-SA 4.0) Feb 6, 2021 at 14:48        That is true, I updated the post to help maintain the same behaviour. It is not the ideal way to solve this issue but is a final option if nothing else is working for you. At this point even the offical docker documentation suggests doing this. I added the link to the post. – (/users/7961500/louis-stekhoven-smith) (1,119 reputation) Louis Stekhoven-Smith  Commented (2021-02-08 03:32:23Z, License: CC BY-SA 4.0) Feb 8, 2021 at 3:32        (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)             This answer is useful  (70:3:31e,16:6f9b06ca97dede98,10:1725173908,16:c71d3ea12b7a990d,8:66297855,5985dc5f31ba07bfc8e765c1b44fe3f3767d3911069306da7b2d1ae28be0a0c1) 17  (This answer is not useful)    (70:3:31e,16:da1d1ff7bf276b9e,10:1725173908,16:efdb0f05bbfdc850,8:66297855,e031f6f0ab302e3c05604f7bd3e7b31bde078e87faa2344b84c80d5ec4deffbd)      Save this answer.  (Loading when this answer was accepted…)     (/posts/66297855/timeline)    Show activity on this post.    In my case, on Ubuntu 20.04, run sudo reboot after this command: $ sudo usermod -aG docker $USER   I literally needed to reboot  my operating system (and machine) for the change to take effect. Restarting/reloading the bash session did not apply the new setting. Sure, newgrp docker does the trick "on the fly" without restart/reboot/re-anything... but once the session terminates, POOF you're not in the docker group any longer. Added this as a formal answer bc it genuinely solved the OP's---and my (identical)---problem. Credit should go to @Omari Celestine for the suggestion, but because I suck at interpretation, I (and maybe you) need the literal disambiguation that this answer provides.   (/a/66297855) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/66297855/edit) () Improve this answer  Follow (70:3:31e,16:06980426aafc4cbc,10:1725173908,16:64308e2a00a9d960,8:66297855,03a9495e510dd1bd702e7fc4cf652e8b8dab2f296e183c7cbd68a18091f9390a)  Follow this answer to receive notifications       answered (2021-02-21 00:05:06Z) Feb 21, 2021 at 0:05   (/users/1286760/4z4t4r) (4Z4T4R's user avatar)    (/users/1286760/4z4t4r) 4Z4T4R 4Z4T4R (reputation score) 2,418 (2 gold badges)  2  2 gold badges (27 silver badges)  27  27 silver badges (45 bronze badges)  45  45 bronze badges        1   I tried the usermod & reboot & doesn't work for me, the only thing working is newgrp docker  – (/users/2431204/kisai) (313 reputation) kisai  Commented (2022-05-12 21:08:29Z, License: CC BY-SA 4.0) May 12, 2022 at 21:08        (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)          This answer is useful  (70:3:31e,16:566ff9368fb5e05a,10:1725173908,16:daf73153e3022a28,8:72571258,08161003b6dd50c8560ed34f88bf5de875715eb3428504ec94669e211420eed9) 3  (This answer is not useful)    (70:3:31e,16:24e2588e9f3117a3,10:1725173908,16:83888a47d66239ba,8:72571258,a922ef82f44297ad0c9f0eaf8bfd56dc48a0364e1feeceb7b0720a11d8d1ad47)      Save this answer.  (Loading when this answer was accepted…)     (/posts/72571258/timeline)    Show activity on this post.    Its a two step process technically. Run sudo usermod -aG docker $USER   then, sg docker -c "bash"     (/a/72571258) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/72571258/edit) () Improve this answer  Follow (70:3:31e,16:20d2f7fe33783f43,10:1725173908,16:22766a952a1aabc4,8:72571258,ccafa50091aca369cead2fcd961e27ceb16a6eb8dcae4036fc215f21c592f69a)  Follow this answer to receive notifications       (/posts/72571258/revisions) (show all edits to this post) edited (2024-06-20 23:17:40Z) Jun 20 at 23:17    (/users/7123660/benjamin-loison) (Benjamin Loison's user avatar)    (/users/7123660/benjamin-loison) Benjamin Loison (reputation score) 5,536 (4 gold badges)  4  4 gold badges (18 silver badges)  18  18 silver badges (37 bronze badges)  37  37 bronze badges     answered (2022-06-10 08:28:08Z) Jun 10, 2022 at 8:28   (/users/7240363/saurabh-kumar) (Saurabh Kumar's user avatar)    (/users/7240363/saurabh-kumar) Saurabh Kumar Saurabh Kumar (reputation score) 2,589 (18 silver badges)  18  18 silver badges (19 bronze badges)  19  19 bronze badges           (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)             This answer is useful  (70:3:31e,16:84c21f413ec4b973,10:1725173908,16:bbdd205ce4601286,8:75000868,f32203705a3d4b0b2923217343f0bd8f7149defe7a1616f4b423e4d73396da0d) 0  (This answer is not useful)    (70:3:31e,16:8a57f3e544118ebd,10:1725173908,16:51a24bcb59eaf4fc,8:75000868,f81ae6cb4e99ab0143caa47d5d874d0b0224c9a4b906a1005e9ba2fe59c2629d)      Save this answer.  (Loading when this answer was accepted…)     (/posts/75000868/timeline)    Show activity on this post.    Change the permissions on the /var/run/docker.sock file and restart docker process. sudo chown jenkins:jenkins /var/run/docker.sock
sudo 644 /var/run/docker.sock   Then, sudo service docker restart     (/a/75000868) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/75000868/edit) () Improve this answer  Follow (70:3:31e,16:81300dc4f251a75e,10:1725173908,16:00d9e1451aaa6e03,8:75000868,05b36786b1cacec34b5d5d1e1eab976a707373ec45cfeae7e8f8ad12cd6c8270)  Follow this answer to receive notifications       answered (2023-01-04 04:09:03Z) Jan 4, 2023 at 4:09   (/users/12562413/sri) (Sri's user avatar)    (/users/12562413/sri) Sri Sri (reputation score) 9 (1 bronze badge)  1  1 bronze badge        1   Your answer could be improved with additional supporting information. Please (https://stackoverflow.com/posts/75000868/edit) edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers (/help/how-to-answer) in the help center . – (/users/3649352/kunal-varpe) (453 reputation) Kunal Varpe  Commented (2023-01-04 07:41:38Z, License: CC BY-SA 4.0) Jan 4, 2023 at 7:41        (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)          This answer is useful  (70:3:31e,16:eefcbeae552317c1,10:1725173908,16:2e1a9bb23902006b,8:78754233,f66de06084a49e563ecbdf4eb97a4f6c8e57dd5d856a62ffe5503f6ecec98f0c) 0  (This answer is not useful)    (70:3:31e,16:002dcd1640414078,10:1725173908,16:1fd11d72f4b59801,8:78754233,1e17f8a328b07b3a41d8c22916c1b2290a85ac60677ffcbec5ea4a97adbabc04)      Save this answer.  (Loading when this answer was accepted…)     (/posts/78754233/timeline)    Show activity on this post.    Try this sudo groupadd docker

sudo usermod -aG docker $USER

newgrp docker   Restart is required for the changes to take effect.   (/a/78754233) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/78754233/edit) () Improve this answer  Follow (70:3:31e,16:a12e259d21e16d29,10:1725173908,16:0c36f156499cb71b,8:78754233,b040dc96f90c1a1676e4aa2f59034986c95b148d056dc34d73b458f696a46769)  Follow this answer to receive notifications       answered (2024-07-16 11:14:02Z) Jul 16 at 11:14   (/users/323015/subhashis) (subhashis's user avatar)    (/users/323015/subhashis) subhashis subhashis (reputation score) 4,772 (8 gold badges)  8  8 gold badges (39 silver badges)  39  39 silver badges (55 bronze badges)  55  55 bronze badges           (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) Add a comment |  (Expand to show all comments on this post)          This answer is useful  (70:3:31e,16:93fcc9501567d8ec,10:1725173908,16:b3098237629c0f2d,8:68289520,e700bfd64635fe45a158fc1372f46df7b172e9dbeb5d75a5c3b33a14284a48d8) -4  (This answer is not useful)    (70:3:31e,16:9dbabe493cd02783,10:1725173908,16:3aff2301a5ec7a5e,8:68289520,2c1b82237697a14c0f46e627dcc73410f6773d4f16d51539e7b457b27cedc2db)      Save this answer.  (Loading when this answer was accepted…)     (/posts/68289520/timeline)    Show activity on this post.    Before running $docker info, Please make sure that the docker service up. If not pls start the service by running below command. $service docker start Now you check the $docker info   (/a/68289520) (Short permalink to this answer) Share  Share a link to this answer     Copy link (https://creativecommons.org/licenses/by-sa/4.0/) (The current license for this post: CC BY-SA 4.0) CC BY-SA 4.0     (/posts/68289520/edit) () Improve this answer  Follow (70:3:31e,16:133eb2e8e0727bf1,10:1725173908,16:064e543be5c5eb31,8:68289520,87e89f86ce157a60f912c203c309eb45c8da2f8ee0673848c763b721420c4e24)  Follow this answer to receive notifications       answered (2021-07-07 16:09:43Z) Jul 7, 2021 at 16:09   (/users/16400731/arrow) (Arrow's user avatar)    (/users/16400731/arrow) Arrow Arrow (reputation score) 1           (Use comments to ask for more information or suggest improvements. Avoid comments like “+1” or “thanks”.) 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