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2025-08-21 08:11:46 Kevin Jung Park: -/-
linux/docker.md ..
@@ 1,1 1,57 @@
# Docker
+
+ ## Introduction
+ In this document, you will learn to install the latest and official Docker on your server.
+ <br/>
+
+ ## Installation
+ **Uninstall old versions**
+
+ > [!IMPORTANT]
+ > There are many unofficial packages, including:
+ > - docker.io
+ > - docker-compose
+ > - docker-compose-v2
+ > - docker-doc
+ > - podman-docker
+ <br/>
+
+ Run this command to uninstall older pacakges:
+ ```bash
+ for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done
+ ```
+ <br/>
+
+ **Install using the apt repository**
+
+ Set up Docker repository, copy and run this hole command:
+ ```bash
+ # Add Docker's official GPG key:
+ sudo apt-get update
+ sudo apt-get install ca-certificates curl
+ sudo install -m 0755 -d /etc/apt/keyrings
+ sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
+ sudo chmod a+r /etc/apt/keyrings/docker.asc
+
+ # Add the repository to Apt sources:
+ echo \
+ "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
+ $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \
+ sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+ sudo apt-get update
+ ```
+ <br/>
+
+ **Install Docker packages**
+ ```bash
+ sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
+ ```
+ <br/>
+
+ **Start docker and test**
+
+ This command downloads a test image and runs it in a container. When the container runs, it prints a confirmation message and exits.
+ ```bash
+ sudo service docker start
+ sudo docker run hello-world
+ ```
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