get docker container id from container name

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## Getting the Docker Container ID from a Container Name: A Comprehensive Guide

This tutorial will guide you through various methods to retrieve the Docker container ID using the container name. We'll cover command-line tools, Docker API interactions, and explore scripting solutions for automation. Understanding how to find a container's ID is essential for managing and interacting with your Docker containers effectively.

**Why You Need the Container ID**

While Docker allows you to interact with containers using their names (e.g., `docker stop my-web-app`), there are situations where the container ID is required:

* **Low-level operations:** Some advanced commands and APIs might require the container ID.
* **Scripting and automation:** When building automation scripts, using container IDs can be more reliable and robust, especially when dealing with naming conflicts or frequent container restarts.
* **Debugging:** Certain debugging tools might require the container ID to attach to a container's process.
* **External systems:** Integrating with external systems that rely on container identification.

**Methods for Retrieving the Container ID**

We'll explore the following methods:

1. **Using `docker ps` with `--format`:** This is the most common and straightforward approach.
2. **Using `docker inspect`:** Provides more detailed information, including the container ID.
3. **Using Docker API (command-line with `curl` or `jq`):** For more programmatic access to Docker information.
4. **Using Docker SDK (e.g., Python's `docker` library):** Offers a high-level interface for interacting with the Docker API from scripting languages.
5. **Bash scripting with `docker ps` and `awk` (or similar tools):** For simple one-liners or scripts to extract the ID.

**1. Using `docker ps` with `--format`**

The `docker ps` command lists running containers. The `--format` option allows you to customize the output and extract specific information.

**Syntax:**
* `docker ps`: ...

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