How to install docker on centos linux

How to install docker on CentOS/Rocky/AlmaLinux

To install docker on Linux, you can follow the following simple steps. These steps have been tested on CentOS 7, Centos Stream 8 & 9, AlmaLinux 8 & 9, Rocky Linux 8 & 9.

1. Update you system: make sure the system is up to date by running the following command:
   

   # yum -y update 

2. Install the required dependencies: Docker requires a few dependencies. Install them by running the following command:
   

   # yum install -y yum-utils device-mapper-persistent-data lvm2 

3. Setup Docker Repository: You can setup the official docker repository by running the following command:
   

   # yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo 

4. Install Docker: Once you have set up the official repository, you can now install docker. But first remove conflicting packages by running the following command:

   # yum -y remove podman pdman-docker runc 

   Now install docker by running the following command:

   # yum -y install docker-ce 

5. Start and Enable the docker service: Once you have set up the official repository, you can now install docker by running the following command:
   

   # systemctl start docker
   # systemctl enable docker

6. Verify the installation: To verify that Docker is installed and running correctly, you can run the following command: This command will download and run the hello-world Docker image, which will display a message to confirm that Docker is working properly.
   

   # docker run hello-world