# Installing Docker on Ubuntu 22.04.4 LTS

## Language
[English](#English) | [中文](#中文)

## English
### Created Date
2025/03/04
### Environment
ubuntu-22.04.4-desktop-amd64.iso
> This is console output：
> ```console=
> $ cat /etc/os-release
> PRETTY_NAME="Ubuntu 22.04.4 LTS"
> NAME="Ubuntu"
> VERSION_ID="22.04"
> VERSION="22.04.4 LTS (Jammy Jellyfish)"
> VERSION_CODENAME=jammy
> ID=ubuntu
> ID_LIKE=debian
> HOME_URL="https://www.ubuntu.com/"
> SUPPORT_URL="https://help.ubuntu.com/"
> BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
> PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
> UBUNTU_CODENAME=jammy
>
> $ uname -a
> Linux wilkes-evt 6.8.0-52-generic #53~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 15 19:18:46 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
> ```
### Symptom
None
### Cause
None
### Solution
1. Update your existing list of packages.

sudo apt update

2. Install a few prerequisite packages which let apt use packages over HTTPS.

sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

3. Add the GPG key for the official Docker repository to your system.

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

4. Add the Docker repository to APT sources.

echo "deb [arch=$(dpkg --print-architecture) 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

5. Download package information from all configured sources.

sudo apt update

6. Make sure you are about to install from the Docker repo instead of the default Ubuntu repo.

apt-cache policy docker-ce

> This is console output：
> ```console=
> $ apt-cache policy docker-ce
> docker-ce:
> Installed: (none)
> Candidate: 5:28.0.1-1~ubuntu.22.04~jammy
> Version table:
> 5:28.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:28.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.5.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.5.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.4.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.4.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.3.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.3.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.2.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.2.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.9-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.8-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.7-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.6-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.6-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.24~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.23~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.22~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.21~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.20~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.19~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.18~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.17~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.16~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.15~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.14~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.13~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> ```
7. Install Docker.

sudo apt install -y docker-ce

8. Check that it’s running.

sudo systemctl status docker

> This is console output：
> ```console=
> $ 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 Thu 2025-02-27 14:11:29 CST; 4 days ago
> TriggeredBy: ● docker.socket
> Docs: https://docs.docker.com
> Main PID: 2874 (dockerd)
> Tasks: 38
> Memory: 100.8M
> CPU: 1min 44.562s
> CGroup: /system.slice/docker.service
> └─2874 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
>
> Feb 27 14:11:28 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:28.890129302+08:00" level=info msg="detected 127.0.0.53 nameserver, assuming systemd-resolved, so using resolv.conf: /run/systemd/resolve/resolv.conf"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.016470639+08:00" level=info msg="[graphdriver] using prior storage driver: overlay2"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.024669616+08:00" level=info msg="Loading containers: start."
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.705815252+08:00" level=info msg="Loading containers: done."
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.739112119+08:00" level=info msg="Docker daemon" commit=af898ab containerd-snapshotter=false storage-driver=overlay2 version=28.0.0
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.739318376+08:00" level=info msg="Initializing buildkit"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.791571564+08:00" level=info msg="Completed buildkit initialization"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.799787483+08:00" level=info msg="Daemon has completed initialization"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.799893542+08:00" level=info msg="API listen on /run/docker.sock"
> Feb 27 14:11:29 wilkes-evt systemd[1]: Started Docker Application Container Engine.
> ```
9. Avoid typing sudo whenever you run the docker command, add your username to the docker group.
- Current logging user：

sudo usermod -aG docker ${USER}

- Other non-login user：

sudo usermod -aG docker <username>

> If `<username>` is john.
>
> $ sudo usermod -aG docker john
>
> If `<username>` is iris.
>
> $ sudo usermod -aG docker iris
10. To apply the new group membership, log out of the server and back in.
### Reference
- [Link](<https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04>)

## 中文
### 建立日期
2025/03/04
### 環境
ubuntu-22.04.4-desktop-amd64.iso
> 這是控制台輸出：
> ```console=
> $ cat /etc/os-release
> PRETTY_NAME="Ubuntu 22.04.4 LTS"
> NAME="Ubuntu"
> VERSION_ID="22.04"
> VERSION="22.04.4 LTS (Jammy Jellyfish)"
> VERSION_CODENAME=jammy
> ID=ubuntu
> ID_LIKE=debian
> HOME_URL="https://www.ubuntu.com/"
> SUPPORT_URL="https://help.ubuntu.com/"
> BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
> PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
> UBUNTU_CODENAME=jammy
>
> $ uname -a
> Linux wilkes-evt 6.8.0-52-generic #53~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 15 19:18:46 UTC 2 x86_64 x86_64 x86_64 GNU/Linux
> ```
### 症狀
無
### 原因
無
### 解決方案
1. 更新您現有的套件清單。

sudo apt update

2. 安裝一些必備軟體包，以便 apt 透過 HTTPS 使用軟體包。

sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

3. 將官方 Docker 儲存庫的 GPG 金鑰新增至您的系統。

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

4. 將 Docker 儲存庫新增至 APT 來源。

echo "deb [arch=$(dpkg --print-architecture) 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

5. 從所有配置的來源下載套件資訊。

sudo apt update

6. 確保您即將從 Docker 倉庫而不是預設的 Ubuntu 倉庫進行安裝。

apt-cache policy docker-ce

> 這是控制台輸出：
> ```console=
> $ apt-cache policy docker-ce
> docker-ce:
> Installed: (none)
> Candidate: 5:28.0.1-1~ubuntu.22.04~jammy
> Version table:
> 5:28.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:28.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.5.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.5.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.4.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.4.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.3.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.3.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.2.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.2.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.1.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:27.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.1.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:26.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:25.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.9-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.8-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.7-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.6-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:24.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.6-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.5-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.4-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.3-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.2-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.1-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:23.0.0-1~ubuntu.22.04~jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.24~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.23~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.22~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.21~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.20~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.19~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.18~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.17~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.16~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.15~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.14~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> 5:20.10.13~3-0~ubuntu-jammy 500
> 500 https://download.docker.com/linux/ubuntu jammy/stable amd64 Packages
> ```
7. 安裝 Docker。

sudo apt install -y docker-ce

8. 檢查它是否正在運行。

sudo systemctl status docker

> 這是控制台輸出：
> ```console=
> $ 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 Thu 2025-02-27 14:11:29 CST; 4 days ago
> TriggeredBy: ● docker.socket
> Docs: https://docs.docker.com
> Main PID: 2874 (dockerd)
> Tasks: 38
> Memory: 100.8M
> CPU: 1min 44.562s
> CGroup: /system.slice/docker.service
> └─2874 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
>
> Feb 27 14:11:28 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:28.890129302+08:00" level=info msg="detected 127.0.0.53 nameserver, assuming systemd-resolved, so using resolv.conf: /run/systemd/resolve/resolv.conf"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.016470639+08:00" level=info msg="[graphdriver] using prior storage driver: overlay2"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.024669616+08:00" level=info msg="Loading containers: start."
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.705815252+08:00" level=info msg="Loading containers: done."
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.739112119+08:00" level=info msg="Docker daemon" commit=af898ab containerd-snapshotter=false storage-driver=overlay2 version=28.0.0
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.739318376+08:00" level=info msg="Initializing buildkit"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.791571564+08:00" level=info msg="Completed buildkit initialization"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.799787483+08:00" level=info msg="Daemon has completed initialization"
> Feb 27 14:11:29 wilkes-evt dockerd[2874]: time="2025-02-27T14:11:29.799893542+08:00" level=info msg="API listen on /run/docker.sock"
> Feb 27 14:11:29 wilkes-evt systemd[1]: Started Docker Application Container Engine.
> ```
9. 避免在執行 docker 命令時輸入 sudo，將您的使用者名稱新增至 docker 群組。
- 目前登入用戶：

sudo usermod -aG docker ${USER}

- 其他非登入中用戶：

sudo usermod -aG docker <username>

> 如果 `<username>` 是 john.
>
> $ sudo usermod -aG docker john
>
> 如果 `<username>` 是 iris.
>
> $ sudo usermod -aG docker iris
10. 若要套用新的群組成員身份，請登出伺服器並重新登入。
### 參考
- [連結](<https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-22-04>)