ubuntu 安装的docker在哪个目录

运行操作系统： 

docker01:/etc/apt$ cat /etc/issue

Ubuntu 20.10 \n \l

参考文档：docker官网文档

Install Docker Engine on Ubuntu | Docker Documentation

一、安装docker

安装依赖：

docker01:/etc/apt$ sudo apt-get install apt-transport-https ca-certificates curl gnupg lsb-release

添加信任的GPG key

@docker01:~$ curl -fsSL  https://download.docker.com/linux/ubuntu/gpg |sudo gpg  --dearmor  -o  /usr/share/keyrings/docker-archive-keyring.gpg

添加docker的镜像源

docker01:/etc/apt$ echo "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

docker01:/etc/apt$ sudo apt-get update

安装docker

docker01:/etc/apt$ sudo apt-get install docker-ce docker-ce-cli containerd.io

添加docker服务开机自启动，并启动docker

docker01:/etc/apt$ sudo systemctl enable docker

查看docker 服务状态

docker01:/etc/apt$ sudo systemctl status docker

● docker.service - Docker Application Container Engine

    Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)

    Active: active (running) since Wed 2021-09-08 22:24:13 CST; 4min 53s ago

TriggeredBy: ● docker.socket

      Docs: https://docs.docker.com

  Main PID: 9398 (dockerd)

      Tasks: 8

    Memory: 28.8M

    CGroup: /system.slice/docker.service

            └─9398 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.197566481+08:00" level=warning msg="Your kernel does not support CPU realtime scheduler"

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.197643255+08:00" level=warning msg="Your kernel does not support cgroup blkio weight"

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.197658253+08:00" level=warning msg="Your kernel does not support cgroup blkio weight_device"

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.198185693+08:00" level=info msg="Loading containers: start."

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.436407447+08:00" level=info msg="Default bridge (docker0) is assigned with an IP address 172.17.0.0/16. Dae>

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.531857430+08:00" level=info msg="Loading containers: done."

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.616001469+08:00" level=info msg="Docker daemon" commit=75249d8 graphdriver(s)=overlay2 version=20.10.8

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.616363666+08:00" level=info msg="Daemon has completed initialization"

Sep 08 22:24:13 docker01 systemd[1]: Started Docker Application Container Engine.

Sep 08 22:24:13 docker01 dockerd[9398]: time="2021-09-08T22:24:13.641779103+08:00" level=info msg="API listen on /run/docker.sock"

Ubuntu Trusty带来的是3.13.0 Linux kernel ，需要准备所有ubuntu库的某些条件，docker安装包被称之为docker.io。(注：Ubuntu (和Debian)包含有一些比较旧的同样被称之为docker的KDE3/GNOME2安装包，因此此处的docker安装包被称之为docker.io。)
  
安装：
  安装ubuntu下的安装包（可能不是最新的）
$ sudo apt-get update
$ sudo apt-get install docker.io
$ sudo ln -sf /usr/bin/docker.io /usr/local/bin/docker
$ sudo sed -i '$acomplete -F _docker docker' /etc/bash_completion.d/docker.io
$ source /etc/bash_completion.d/docker.io
如果你想尝试一下最新版打docker
首先，你要检查一下APT系统能够被https解析，URLs：文件/usr/lib/apt/methods/https应该已经存在了，如果没有，你需要安装软件包apt-transport-https！
[ -e /usr/lib/apt/methods/https ] || { apt-get update apt-get install apt-transport-https }
之后，添加Docker repository key到本地keychain
$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
添加docker软件仓库到软件源，升级软件源，安装lxc-docker包！
$ sudo sh -c "echo deb https://get.docker.com/ubuntu docker main /etc/apt/sources.list.d/docker.list"
$ sudo apt-get update
$ sudo apt-get install lxc-docker
注：有个简单脚本可以用于这个过程
$ curl -sSL https://get.docker.com/ubuntu/ | sudo sh
验证所有的工作都如预期完成了
$ sudo docker run -i -t ubuntu /bin/bash
OK，完毕！谢谢阅读，希望能帮到大家，请继续关注，我们会努力分享更多优秀的文章。