How to Install Docker on Linux

What is Docker and How Does it Work on Linux?

Docker is an open source containerization platform that enables Linux system administrators to easily deploy, manage and scale applications in a secure and efficient manner. Docker containers are isolated from each other and bundle up all the necessary components of an application, such as libraries and other dependencies, into a single package.

This makes it easier for developers to quickly deploy their applications on any Linux system without worrying about compatibility issues. With Docker, Linux system administrators can quickly create, deploy and manage multiple applications on the same server without having to worry about resource contention or security risks.

Basics of Working with Containers in Linux

Working with containers in Linux is a great way to manage and deploy applications in an efficient and cost-effective manner. Containers are lightweight, isolated environments that allow developers to package their applications into one unit for easy deployment.

Containers offer many benefits over traditional virtual machines, including faster startup times, better resource utilization, and improved scalability. With the right tools and knowledge, you can use containers to deploy your applications quickly and easily on Linux systems.

Benefits of Using Docker for System Administration in Linux

Docker is an increasingly popular tool for system administrators in Linux systems. It provides a great way to automate administrative tasks, which can save time and money. Docker also offers scalability advantages, as it allows administrators to quickly deploy and scale applications across multiple machines.

Additionally, Docker is incredibly efficient, allowing admins to run multiple applications on the same machine without affecting performance or stability. These benefits make Docker a great choice for system administration in Linux systems.

The following steps will hep you get started with docker environment.

# curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo

# sed -i -e "s/enabled=1/enabled=0/g" /etc/yum.repos.d/docker-ce.repo

# yum --enablerepo=docker-ce-stable -y install docker-ce

# systemctl enable --now docker

# rpm -q docker-ce

docker-ce-20.10.8-3.el7.x86_64

# docker version

Client: Docker Engine - Community
 Version:           20.10.8
 API version:       1.41
 Go version:        go1.16.6
 Git commit:        3967b7d
 Built:             Fri Jul 30 19:55:49 2021
 OS/Arch:           linux/amd64
 Context:           default
 Experimental:      true

Server: Docker Engine - Community
 Engine:
  Version:          20.10.8
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.6
  Git commit:       75249d8
  Built:            Fri Jul 30 19:54:13 2021
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.4.9
  GitCommit:        e25210fe30a0a703442421b0f60afac609f950a3
 runc:
  Version:          1.0.1
  GitCommit:        v1.0.1-0-g4144b63
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0