Networking can feel complicated because we hear words like IP, DNS, ports, subnets, routing, NAT, VPC, Docker, Kubernetes, Ingress — all at once. But the easiest way to understand networking is to follow one simple question: “How does a request find the right application, and how do we control who is allowed to reach it?”…
Top 10 DevOps Interview Questions I have listed down top 10 DevOps interview questions on few topics like, Git, Maven, Jenkins, Docker, Kubernetes, Ansible. Git: Maven ( Hint: Builds, Documentation, Reporting,SCMs,Releases,Distribution) ( Hint: mvn install ) Jenkins Docker docker kill $(docker ps -q) docker rm $(docker ps -a -q) docker rmi $(docker images -q) List:…
List of commands which I use day to day basis to perform my task in HDFS. Checkout below hdfs cheat sheet for reference. In below list I have covered Copy, Move, Check file/directory size, Change ownership of file/group, delete the files and directories etc. HDFS Cheat Sheet hdfs dfs -ls / list of all files…
Jenkins Questions and Answers Here are the list of Jenkins Questions. What is the Jenkins ? How you will use Jenkins to automate CI/CD ? How to configure your Github or Bitbucket repository to trigger the build when any changes happen in code ? Please explain all the steps to integrate SonarQube scan with Jenkins…
Types of Jobs in Jenkins We can create below types of jobs in Jenkins. Freestyle Project Pipeline Multiconfiguration Projects Folder GitHub organization Mutlibranch Pipeline
What is Jenkins? Jenkins is one of the most popular Continuous Integration (CI) and Continuous Delivery (CD) tool. Jenkins is Open Source written in Java. Jenkins can be used in automation of any task related to build, test and deployment of an application. Prerequisites to Install Jenkins Java – JRE/JDK 8 or 11 Minimum hardware…
Jenkins is one of the most popular Continuous Integration (CI) and Continuous Delivery (CD) tool. Jenkins is an Open Source build written in Java. Jenkins can be used in automation of any task related to build, test and deployment of an application. Please find some of popular use cases in Jenkins. Some Popular Use Cases…
I usually prefer to execute process in background so that we don’t need to worry if terminal got killed due to timeout or accidently. However, what if you want to kill the process then definitely you will you PID of that process to kill it. You may be interested to check all process which is…
This article help you to check certificate expiry date from Linux command line using openssl utility. Check SSL certificate expiration date
IPv4 forwarding is disabled WARNING I was facing this issue while creating a Docker image in Centos 7. Error: —> [Warning] IPv4 forwarding is disabled. Networking will not work. Solution: Add net.ipv4.ip_forward=1 in /etc/sysctl.conf Restart network service $ systemctl restart network.
