EPEL(Extra Package for Enterprise Linux) is a special intrest group from the Ferdora group that provides some additional packages for Redhat family i.e.Ubuntu,CentoOS etc. For access EPEL user should install EPEL repository yum install epel-release -y For refresh the epel repo yum repolist Install packages from epel repo yum install pkg1

What is DevOps in simple terms? DevOps is a set of practical methods that shorten the time from submission to deployment of system changes to the production environment under the premise of ensuring high quality. DevOps is a combination of two functions that are typically treated separately: development and operations. That definition of DevOps is the Standardized development methodology, clear communication, and documented processes supported by a standards-based, proven middleware platform to improve application development and management cycles, bring agility,

What is DevOps in simple terms?Ans: devops is a combination of all the teams such as development, testing, architecture where all work on common goal or to solve a problem and reduce the time of delivery and to maintain the software quality What exactly do DevOps do?Ans: reduces the time of delivery and improves the quality of the software product by automating the processes. it combines all the teams like development, testing, architecture to work on the goal or problem,

DevSecOps basically stands for Development, Security and Operations and an approach to automate the project by adding the security into it.

DevSecOps stands for development,security and operations.Its an approach to automate the process and security for the the software throughout the entire lifecycle

DevOps Team will reduce the communication gap between the dev and operation team for faster release of application or product or project to the client. Whereas SRE Team will comprehensively get involved into solving the system engineering process by ensuring reliability and stability and will deal with the activities like production failures, infrastructure issues, monitoring.

The main difference between these two is DevOps team will reduce communication between development and operation team for faster application release whereas SRE team will get involved after deploying the application in production environment for system reliability,maintainence and for support related activities

Git, Jenkins, Docker, Ansible, Kubernetes, Maven, Selenium.

1.Linux 2.Git and Github 3.Maven 4.Jenkins 5.Docker 6.Kubernetes 7.Ansible 8.Terraform 9.Junit,Selenium 10.Nagios

DevOps generally automates the project / integrates different tools with the help of different automation tools using predefined plugins.

Its just automates the automation process with the help of Jenkins,docker,ansible etc.

DevOps is not just a tool or service, its a methodology/culture which allows the development and operations team to work together as a team.

1.What is Devops? Devops is not just tool or a service,its a culture that is overtaking the business world.

Q1. What are differences between the git distributed model and svn server-client model? Git is open source distributed vice control system whereas Apache Subversion is an open source software version and revision control system under Apache license Git has a Distributed Model. But SVN has a Centralized Model. In git every user has their own copy of code on their local like their own branch but In SVN there is central repository has working copy that also make changes and committed

Components of Docker and its Brief Summary Docker has below components.  dockerd – is a docker daemon which listens for docker API requests using three different types of sockets(unix, tcp and fd)  Containerd – is responsible for managing container lifecycle. It takes care of image push/pull, managing storage, invoking execution of containers, managing network primitives RunC – is command-line client for running applications packed according to OCI format and is a compliant implementation of the OCI What is the differenece

Docker –version         gives the version of docker that’s being used Docker pull                 to pull an image from the registry Docker run <image>  to create a container Docker ps                    list of running containers Docker ps –a               shows all the running and exited containers Docker stop                stop a running container gracefully Docker kill                  stops a running container abruptly Docker commit           creates a new image of an edited container Docker push                used to push an image

CMD is an instruction given in the dockerfile which is executed in the container when the image is run. When two CMD instructions are given in the dockerfile, the latest one is executed. Entrypoint is similar to CMD except that when more instructions are given all are appended.    Dockerfile should specify at least any one of the CMD or Entrypoint commands.

Dockerfile is a simple text file which is a collection of commands and instructions that are used to build a docker image. The Docker build command is used to build docker images using the instructions mentioned in the dockerfile.

Docker exec command is used to access the contents of a container and runs the commands inside the container. Docker attach command is used to attach our terminal to a running container to view it’s working.

Docker stop stops the running container by gracefully stopping step by step whereas docker kill abruptly stop a running container.