使用 snap 和 apt-get 安装 docker

Question

我正在尝试在 Ubuntu 20.04 上安装 docker。apt-get尝试使用和安装 docker snap：

sudo apt-get install docker

输出：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  wmdocker
The following NEW packages will be installed:
  docker wmdocker
0 upgraded, 2 newly installed, 0 to remove and 6 not upgraded.
Need to get 0 B/14.3 kB of archives.
After this operation, 58.4 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Selecting previously unselected package wmdocker.
(Reading database ... 193518 files and directories currently installed.)
Preparing to unpack .../wmdocker_1.5-2_amd64.deb ...
Unpacking wmdocker (1.5-2) ...
Selecting previously unselected package docker.
Preparing to unpack .../archives/docker_1.5-2_all.deb ...
Unpacking docker (1.5-2) ...
Setting up wmdocker (1.5-2) ...
Setting up docker (1.5-2) ...
Processing triggers for man-db (2.9.1-1) ...

如果我运行 docker 命令，我会收到错误：

a@ubuntu:~$ docker

Command 'docker' not found, but can be installed with:

sudo snap install docker     # version 19.03.11, or
sudo apt  install docker.io  # version 19.03.8-0ubuntu1.20.04.1

See 'snap info docker' for additional versions.

为什么系统找不到docker命令？

然后我绑了扣子：

sudo snap install docker 

并且 docker 命令运行良好。

为什么我可以使用 snap 安装 docker 而不能使用 apt-get ？

Answer 1

因为那docker不是你所期望的 docker。docker是 KDE3/GNOME2 系统托盘的软件包名称。您可以通过访问Ubuntu 软件包搜索或运行来验证这一点

apt show docker

从终端运行时收到的错误消息docker简要说明了这种混乱。

要安装您想要的 docker，请参阅官方文档或参见如何在 Ubuntu 20.04 LTS 上安装 docker 社区？