└── README.md


/README.md:
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  1 | # Docker-Cheatsheet
  2 | 
  3 | This repository contains all the Docker knowledge you need to get started as a beginner.
  4 | 
  5 | ## Docker Installation
  6 | 
  7 | ### Install Docker using the following command on your Linux machine:
  8 | ```bash
  9 | sudo apt install docker.io
 10 | ```
 11 | ### Installing Docker on Windows
 12 | 
 13 | 1. **Download Docker Desktop:**
 14 |     - Install the Docker Desktop for Windows by clicking [HERE](https://desktop.docker.com/win/stable/Docker%20Desktop%20Installer.exe).
 15 | 
 16 | 2. **Install Docker Desktop:**
 17 |     - Run the Docker Desktop installer.
 18 |     - Follow the installation instructions on the screen.
 19 |     - Once the installation is complete, start Docker Desktop from the Start menu.
 20 | 
 21 | 3. **Configuration:**
 22 |     - Docker Desktop will launch and complete the initial configuration.
 23 |     - You may need to enable virtualization in your BIOS/UEFI settings if it's not already enabled.
 24 | 
 25 | 4. **Verify Installation:**
 26 |     - Open a Command Prompt or PowerShell.
 27 |     - Run the following command to verify that Docker is installed correctly:
 28 |         ```bash
 29 |         docker --version
 30 |         ```
 31 |     - You should see the Docker version information displayed.
 32 |   
 33 | ## Docker Commands
 34 | 
 35 | ### Container Management
 36 | 1. **Run a Container:**
 37 |     ```bash
 38 |     docker container run --publish {host_port}:{container_port} --detach --name {container_name} {image} {bash}
 39 |     ```
 40 |     - Example: `8080:80` forwards traffic from port 8080 on the host to port 80 in the container.
 41 |     - `--detach` runs the container in the background.
 42 |     - `--publish` maps host ports to container ports.
 43 | 
 44 | 2. **Stop a Container:**
 45 |     ```bash
 46 |     docker container stop {name_or_ID}
 47 |     ```
 48 | 
 49 | 3. **Start a Container:**
 50 |     ```bash
 51 |     docker container start {name_or_ID}
 52 |     ```
 53 | 
 54 | 4. **List Running Containers:**
 55 |     ```bash
 56 |     docker container ls
 57 |     ```
 58 | 
 59 | 5. **List All Containers:**
 60 |     ```bash
 61 |     docker container ls -a
 62 |     ```
 63 | 
 64 | 6. **Show Container Processes:**
 65 |     ```bash
 66 |     docker container top {name_or_ID}
 67 |     ```
 68 | 
 69 | 7. **Inspect a Container:**
 70 |     ```bash
 71 |     docker container inspect {name_or_ID}
 72 |     ```
 73 | 
 74 | 8. **View Container Logs:**
 75 |     ```bash
 76 |     docker container logs {name_or_ID}
 77 |     ```
 78 | 
 79 | 9. **Show Live CPU Usage:**
 80 |     ```bash
 81 |     docker container stats
 82 |     ```
 83 | 
 84 | ### Interactive Mode
 85 | 10. **Run a Container in Interactive Mode:**
 86 |     ```bash
 87 |     docker container run -it --name {container_name} {image} /bin/bash
 88 |     ```
 89 |     - `-it` flags for interactive terminal (tty).
 90 | 
 91 | 11. **Start an Interactive Container:**
 92 |     ```bash
 93 |     docker start -ai {container_name}
 94 |     ```
 95 |     - `-a` for attach.
 96 |     - `-i` for interactive.
 97 | 
 98 | ### Image Management
 99 | 12. **List Images:**
100 |     ```bash
101 |     docker image ls
102 |     ```
103 | 
104 | 13. **Remove an Image:**
105 |     ```bash
106 |     docker image rm {image_name}
107 |     ```
108 |     - Or: `docker rmi {image_name}`
109 |     - Use `-f` to force delete.
110 | 
111 | 14. **Pull an Image:**
112 |     ```bash
113 |     docker pull {image_name}
114 |     ```
115 |     - Example: `alpine` is a small Linux distro (4MB).
116 |     - Note: Alpine does not include bash by default, use `sh` instead.
117 | 
118 | ### Network Management
119 | 15. **Inspect Container IP:**
120 |     ```bash
121 |     docker container inspect --format '{{.NetworkSettings.IPAddress}}' {name_or_ID}
122 |     ```
123 | 
124 | 16. **Verify Port Mapping:**
125 |     ```bash
126 |     docker container port {name_or_ID}
127 |     ```
128 | 
129 | 17. **List Networks:**
130 |     ```bash
131 |     docker network ls
132 |     ```
133 |     - Example: `bridge` is the default Docker virtual network.
134 | 
135 | 18. **Create a Network:**
136 |     ```bash
137 |     docker network create {network_name}
138 |     ```
139 | 
140 | 19. **Run a Container in a Specific Network:**
141 |     ```bash
142 |     docker container run -d --name {container_name} {image} --network {network_name}
143 |     ```
144 | 
145 | 20. **Connect a Container to a Network:**
146 |     ```bash
147 |     docker network connect {network_name} {container_name}
148 |     ```
149 | 
150 | 21. **Ping Between Containers:**
151 |     ```bash
152 |     docker container exec -it {container_1} ping {container_2}
153 |     ```
154 | 
155 | ### Building Custom Docker Images
156 | 22. **Build an Image:**
157 |     ```bash
158 |     docker build -t {image_name} -f {Dockerfile} .
159 |     ```
160 |     - `-t` tags the image.
161 |     - `-f` specifies the Dockerfile.
162 |     - `.` indicates the current directory contains the files needed for the build.
163 | 
164 | 23. **Run a Custom Image:**
165 |     ```bash
166 |     docker container run {image_name}
167 |     ```
168 | 
169 | ---
170 | 
171 | Author: **Purva Patel**
172 | 


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