小白安裝docker的時候遇到的一個炒雞大坑

docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/create: dial unix /var/run/docker.sock: connect: permission denied.

電腦配置

                          ./+o+-       用戶名@主機名
                  yyyyy- -yyyyyy+      OS: Ubuntu 18.04 bionic
               ://+//////-yyyyyyo      Kernel: x86_64 Linux 4.15.0-72-generic
           .++ .:/++++++/-.+sss/`      Uptime: 6m
         .:++o:  /++++++++/:--:/-      Packages: 4914
        o:+o+:++.`..```.-/oo+++++/     Shell: zsh 5.4.2
       .:+o:+o/.          `+sssoo+/    Resolution: 1280x1024
  .++/+:+oo+o:`             /sssooo.   DE: XFCE
 /+++//+:`oo+o               /::--:.   WM: Xfwm4
 \+/+o+++`o++o               ++////.   WM Theme: Mojave-light
  .++.o+++oo+:`             /dddhhh.   GTK Theme: TraditionalOk [GTK2]
       .+.o+oo:.          `oddhhhh+    Icon Theme: Tela
        \+.++o+o``-````.:ohdhhhhh+     Font: Sans 10
         `:o+++ `ohhhhhhhhyo++os:      CPU: Intel Core i5-6500 @ 4x 3.6GHz [53.0°C]
           .o:`.syhhhhhhh/.oo++o`      GPU: Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) 
               /osyyyyyyo++ooo+++/     RAM: 714MiB / 15920MiB
                   ````` +oo+++o\:    
                          `oo++.      

問題：

╰─$ docker run hello-world
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.

解決辦法：
臨時對策，未找到永久對策。
How to fix docker: Got permission denied while trying to connect to the Docker daemon socket
打不開連接看下面：

    ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
    srw-rw---- 1 root root 0 Oct 17 11:08 docker.sock
    ubuntu@ip-172-31-21-106:/var/run$ sudo chmod 666 /var/run/docker.sock
    ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
    srw-rw-rw- 1 root root 0 Oct 17 11:08 docker.sock

把/var/run/docker.sock文件的權(quán)限改為666
有的系統(tǒng)路徑在/run/docker.sock

參考

ubuntu docker命令免sudo 執(zhí)行
Ubuntu下docker使用非root權(quán)限運行docker
史上最全Docker環(huán)境安裝指南