> For the complete documentation index, see [llms.txt](https://rejenthompson.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rejenthompson.gitbook.io/writeups/try-hack-me-writeups/thm-intro-to-docker.md).
# THM : Intro to Docker
This guide walks you through the "Intro to Docker" room on TryHackMe, covering Docker basics, useful commands, and practical tasks for container management and orchestration. Whether you're new to Docker or refreshing your skills, this overview will help you gain a solid foundation in containerization.
***
#### Task 1: Introduction
No specific answers are needed for this task. If you've completed the Linux Fundamentals module on TryHackMe, you're well-prepared for this room.
***
#### Task 2: Basic Docker Syntax
1. **Pull an Image**: To pull a Docker image from Docker Hub, use:
```bash
docker pull
```
2. **List All Images**: To list all Docker images on your system, use:
```bash
docker image ls
```
3. **Example Command**: To pull a specific image:
```bash
docker pull tryhackme
```
To pull a specific tag of an image:
```bash
docker pull tryhackme:1337
```
***
#### Task 3: Running Your First Container
1. **Run a Container Interactively**:
```bash
docker run -it
```
2. **Run in Detached Mode**:
```bash
docker run -d
```
3. **Bind a Web Server to Port 80**:
```bash
docker run -p 80:80
```
4. **List Running Containers**:
```bash
docker ps
```
5. **List All Containers (Including Stopped)**:
```bash
docker ps -a
```
***
#### Task 4: Intro to Dockerfiles
1. **Specify Base Image**:
```dockerfile
FROM
```
2. **Run a Command**:
```dockerfile
RUN
```
3. **Build an Image from a Dockerfile**:
```bash
docker build -t .
```
***
#### Task 5: Intro to Docker Compose
1. **Start Services with Docker Compose**:
```bash
docker-compose up
```
2. **Stop and Remove Services**:
```bash
docker-compose down
```
3. **Docker Compose File**: The configuration file for Docker Compose is named `docker-compose.yml`.
***
#### Task 6: Docker Socket and IPC
1. **IPC (Interprocess Communication)**: Docker enables communication between processes in containers.
2. **Docker Server Comparison**: The Docker Server’s functionality can be compared to an API for managing and interacting with containers.
***
#### Task 7: Practical
1. **Identify Running Container**: Connect to the machine to find the container name, which is typically listed as "CloudIsland."
2. **Run a Web Server**:
```bash
docker run -d -p 80:80 webserver
```
After launching the web server, visit the provided URL to retrieve the flag.
---
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