1) Maven

Installation of Maven build tool in Ubuntu 20.04 LTS

a) Update the system repository using:

sudo apt update

b) Install Maven from the official repository: 

sudo apt install maven  

c) When prompted, type Y and press Enter to confirm the installation. 

d) Check the current version of Maven to verify the installation: 

mvn -version  

If successful, the output will look like this: 

e) How to build java maven project 

Change directory (cd ) to project name: 

Run mvn compile : It will create a target folder after that run mvn package it will generate the zip artefact in the target folder. 

2) DOCKER

How to install Docker in Ubuntu:

How to install Docker in Ubuntu 20.04

sudo apt update

sudo apt install apt-transport-https ca-certificates curl software-properties-common

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add –

sudo add-apt-repository “deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable”

apt-cache policy docker-ce

sudo apt install docker-ce

sudo systemctl status docker

3) SonarQube server installation in Ubuntu

Installation of SonarQube in the EC2 Ubuntu 20.04 LTS

Prerequisites 

 

• • Ubuntu 20.04 LTS with t2.medium 

• • https://www.sonarqube.org/trial-request/developer-edition/ (Click on the link, register and download sonarqube-9.7.1.62043) 

• • Open GitBash terminal in local 

• • How to copy sonarqube-9.7.1.62043.zip from local to EC2:

     

    • • download key pair “sonar_qube_key_pair” to your local  
    • • “chmod 400 sonar_qube_key_pair” 
    • • Keep key pair and  sonarqube-9.7.1.62043.zip at same folder or location. 
    • • Run command below to copy SonarQube from download to EC2 instance home: 
    • • scp -i sonar_qube_key_pair.pem sonarqube-developer-9.7.1.62043.zip ubuntu@ec2-3-215-186-196.compute-1.amazonaws.com:/home/ubuntu 

 

• • PostgreSQL Version 9.3 or higher

• • SSH access with sudo privileges 

Port opens: 

TCP: 9000

 TCP: 5432 

TCP: 22:

TCP: 443

Steps followed to configure the SonarQube: 

To Increase the vm.max_map_count kernal ,file discriptor and ulimit for current session at runtime. 

sudo sysctl -w vm.max_map_count=262144 

sudo sysctl -w fs.file-max=65536 

ulimit -n 65536 

Upgrade and update EC2 instance and install Java 11jdk and jre: 

Sudo apt-get upgrade 

Sudo apt-get update 

sudo apt-get install openjdk-11-jdk -y 

sudo apt-get install openjdk-11-jre -y 

Check java version: 

Install and Setup PostgreSQL 10 Database For SonarQube 

sudo apt-get -y install postgresql postgresql-contrib 

sudo systemctl start postgresql  

sudo systemctl enable postgresql 

sudo passwd postgres  

su – postgres 

createuser sonar  

Password: Glob@qw 

Type:psql 

ALTER USER sonar WITH ENCRYPTED password ‘sonar’; 

grant all privileges on DATABASE sonarqube to sonar; 

q 

exit 

Create a sonar user : 

Password for soanr user: MasterB#456OpLead 

Configure SonarQube 

Copy sonarqube-9.7.1.62043.zip to /opt: and unzip 

sudo unzip sonarqube-9.7.1.62043.zip -d /opt 

sudo mv /opt/sonarqube-9.7.1.62043 /opt/sonarqube 

Give access to the sonar user: 

sudo useradd -c “user to run SonarQube” -d /opt/sonarqube -g sonar sonar 

sudo chown sonar:sonar /opt/sonarqube -R 

sudo vim /opt/sonarqube/conf/sonar.properties 

Update the username and password of database: 

sudo vim /opt/sonarqube/bin/linux-x86-64/sonar.sh 

sudo su sonar 

cd /opt/sonarqube/bin/linux-x86-64/ 

./sonar.sh start 

Configure Systemd service: 

cd /opt/sonarqube/bin/linux-x86-64/ 

./sonar.sh stop 

sudo vim /etc/systemd/system/sonar.service 

sudo systemctl start sonar 

sudo systemctl enable sonar 

Click on the link below: 

http://3.239.83.182:9000/sessions/new?return_to=%2F 

Username:admin 

Password: Glob@qw 

4.) DevOps Interview questions of 2024

Which are some of the most popular DevOps tools?

 

• • Git

• • Azure DevOps

• • Jenkin

• • Ansible

• • Docker

• • Kubernetes

• • Selenium

• • Azure test plans

• • Appium

 What is the git command that downloads any repository from GitHub to your computer?  

git clone <repo url>

 Which of the following CLI commands can be used to rename files?

  git mv repo_name  destination_repo_name

 What is the process for reverting a commit that has already been pushed and made public? 

  Create a new commit with the latest changes that were made in the bad commit. Use   the following command: git revert  <commit_id>

5) Docker Interview questions

6) Trivy

7) SonarQube