What is Jenkins?
Jenkins is an open-source continuous integration tool. The functionality of Jenkins is to keep track of version control system & initiate, monitor build system if changes occur.

SCM tools supported by Jenkins?
It supports the following tools:

• ClearCase.
• Perforce.
• Git.
• RTC.
• AccuRev.
• Subversion.

Requirements for the use of Jenkins?

• Source code repository which can be accessible, Git repository, instance.
• Script already working & built e.g maven script.

Commands used for starting Jenkins manually?
We can use the following commands to start manually:

(jenkins_url)/safeRestart.
(jenkins_url)/restart.

Plugins that are mostly used for Jenkins?
Useful plugins for Jenkins:

• HTML publisher.
• Join.
• Maven2 project.
• Copy artifact.
• Amazon EC2.

How to copy, move Jenkins from one to another server?

• By making a clone of a job directory with a different name you can copy Jenkins.
• By renaming the existing job via renaming a directory could be done.
• Copy the linked job directory & slide job from one to another installation.

Jenkins is integrated with 2 components what are they?

The 2 components are:
Tools like apache maven & SVN, GIT(version control systems).

Advantages of Jenkins?
Following are the advantages of Jenkins:

• At integration stage, build failures are cached.
• Maven release projects are automated by using simple steps.
• Plugin support is in large scale.
• At an early stage, bugs can be identified in the development environment.
• The code is improved iteratively.

Notify the difference between Jenkins, Maven & ant?
Jenkins is an open-source continuous integration tool whereas ant & maven are Build technologies.

Steps to setup Jenkins jobs?

Step by step procedure:

1. Select item forms the menu.
2. Enter the name of the job → free-style job.
3. Press OK to continue & create a new job in Jenkins.
4. Configure you jon in the next page.

Tool used for configuration & provisioning?
Ansible-It is an agent with less config management as well orchestration tool. The configuration modules are called ‘Playbooks’. Ansible can be used for more of cloud provisioning.

Minimum JRE required for a run of Jenkin 2.1?

JRE8 or Else JDK8