Docker Installation on RHEL

This guide provides steps to install Docker on a RHEL (Red Hat Enterprise Linux) system.

Prerequisites

Ensure that you have sudo privileges on the RHEL system.

Install yum-utils

yum-utils is a collection of utilities and plugins that extend and enhance the functionalities of yum.
```
sudo yum install -y yum-utils
```
- -y flag: Automatically answers "yes" to all prompts during the installation, allowing yum to proceed without user interaction.
Add Docker's Official Repository

Use the yum-config-manager utility to add Docker's official repository to your system.
```
sudo yum-config-manager --add-repo https://download.docker.com/linux/rhel/docker-ce.repo
```
Install Docker and its Components

Install Docker Community Edition along with essential tools. This includes Docker Compose, which is required for defining and running multi-container Docker applications. The --allowerasing flag allows yum to resolve any package conflicts by removing incompatible packages if necessary.
```
sudo yum install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin --allowerasing
```
Enable Docker to Start on Boot

Ensure that Docker starts automatically whenever the system boots up.
```
sudo systemctl enable docker
```
Reboot the System

Reboot your system to apply all changes and start Docker.
```
sudo reboot
```

After the system reboots, Docker will start automatically. You can verify that Docker is running by checking its status:

sudo systemctl status docker

sudo docker ps

Get started with Docker by running the hello-world container to verify the installation:

sudo docker run hello-world

If you encounter any issues, you can check Docker's logs using:

sudo journalctl -u docker