Podman is a tool specially designed to manage containers and pods without the help of daemon. All other containers & pods are created as a child processes of the Podman tool. CLI of podman is basically based on Docker CLI.
CentOS 8 / RHEL 8 has dropped official support for Docker as container runtime . Red Hat has been also working on libpod which is Podman’s contianer management library, provides a library for application to use the Container Pod concept available in the world of Kubernetes.

One of the tolls from the libpod project is podman. In this tutorial, we are going to learn that how can we Install Podman on our CentOS 8 / RHEL 8. At the end of tutorial you can easily proceed with the installation.

Run the following command in your Terminal to get started with the Installation:

[sabi@localhost ~]$ sudo dnf module list | grep container-tools
 container-tools      1.0          common [d]                               Common tools and dependencies for container runtimes               
 container-tools      rhel8 [d][e] common [d]                               Common tools and dependencies for container runtimes          
sudo dnf install -y @container-tools

On successful installation you’ll see the following output:

Type the below command to verify that installation was successful and verify the installed version.

[sabi@localhost ~]$ podman version
 Version:       1.0.5
 Go Version:    go1.11.6
 OS/Arch:       linux/amd64

To get more information about the command and using run the following command

podman --help

Using Podman on CentOS 8 / RHEL 8

After installing the Podman on your system, move toward using the Podman on CentOS 8 / RHEL 8. For these purposes simply run a basic container .

[sabi@localhost ~]$ podman run -it --rm alpine sh
Trying to pull docker.io/alpine:latest…Getting image source signatures
 Copying blob 63bc94deeb28: 2.48 MiB / 2.67 MiB [============================>--]
 Copying blob 63bc94deeb28: 2.67 MiB / 2.67 MiB [============================] 4s
 Copying config c85b8f829d1f: 1.48 KiB / 1.48 KiB [==========================] 0s
 Writing manifest to image destination
 Storing signatures
 / # cat /etc/os-release
 NAME="Alpine Linux"
 ID=alpine
 VERSION_ID=3.11.0
 PRETTY_NAME="Alpine Linux v3.11"
 HOME_URL="https://alpinelinux.org/"
 BUG_REPORT_URL="https://bugs.alpinelinux.org/"
 / # exit

Download the Container Images

Type the below command to download the desired containers images

Pull image
 $ podman pull ubuntu
 $ podman pull centos
 List existing images
 $ podman images
 REPOSITORY                 TAG      IMAGE ID       CREATED       SIZE
 docker.io/library/ubuntu   latest   775349758637   3 weeks ago   66.6 MB
 docker.io/library/alpine   latest   965ea09ff2eb   5 weeks ago   5.82 MB
 docker.io/library/centos   latest   0f3e07c0138f   7 weeks ago   227 MB

Deleting your Podman Container Images

Run the below commands to delete the container images on podman

podman rmi <Type your Container image id>
podman rmi  775349758637 

So these all were the basic commands and a few things to know about podman installation and managing basic container images on CentOS 8 / RHEL 8.
In our next tutorial, we will cover the complete working of podman follow it by visiting the below link.

How To run Docker Containers using Podman and Libpod.

You can also view the following articles to enhance your knowledge.

How To Install Podman on Debian

How To Install Podman on Arch Linux / Manjaro

Installing Podman on Ubuntu 19.04

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