Elevate Programming

A Makefile is a special file used in Unix and Unix-like operating systems to automate the building and compilation of programs or projects. It contains a set of rules and dependencies that specify how to build a target, typically an executable program or a collection of files. .SILENT : all : first second last # .DEFAULT_GOAL:= last first :     echo "hello world" second :     echo "hello Gaurav" last :     echo "hello world Gaurav"   Refer  here  for more details

 curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 sudo install minikube-linux-amd64 /usr/local/bin/minikube Start a cluster -  minikube start Start second cluster - minikube start -p cluster2 List all minikube cluster running: minikube profile list Set second cluster as current profile- Kubectl: Set kubectl alias to run kubectl commands for minikube if kubectl is not installed locally: alias kubectl = "minikube kubectl --" View kubernetes config: kubectl config view To access minikube from windows command prompt -  Update kube config file as per config on WSL running minikube apiVersion : v1 clusters : - cluster :     certificate-authority : \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\ca.crt     server : https://127.0.0.1:49159   name : cluster2 - cluster :     certificate-authority : \\wsl.localhost\Ubuntu\home\gaugupta\.minikube\ca.crt     server : https://127.0.0.1:49154   name :...

Steps to setup docker on Windows 10/11 system without installing Docker Desktop application, which is just a GUI for docker. First, you need to install WSL (Windows subsystem for Linux) if not already installed - wsl --install Note: It will install ubuntu linux as default linux flavour. If you need to check and install any other use below command:          wsl --list --online          wsl --install kali-linux Next, install docker using below commands # Add Docker's official GPG key: sudo apt-get update sudo apt-get install ca-certificates curl gnupg sudo install -m 0755 -d /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg sudo chmod a+r /etc/apt/keyrings/docker.gpg # Add the repository to Apt sources: echo \   "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \   "$(. /etc/os-rele...

Setup MongoDB community server as a single node. $ docker pull mongodb/mongodb-community-server Verify MongoDB image is downloaded successfully:  $ docker images Run docker image $ docker run --name mongo -p 27017:27017 -d mongodb/mongodb-community-server:latest Setup MongoDB 3 node cluster on docker The steps to create a docker cluster are as follows. Create a Docker network.                $ docker network create mongoCluster Start three instances of MongoDB. docker run -d --rm -p 27017:27017 --name mongo1 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo1 docker run -d --rm -p 27018:27017 --name mongo2 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo2   docker run -d --rm -p 27019:27017 --name mongo3 --network mongoCluster mongo mongod --replSet myReplicaSet --bind_ip localhost,mongo3 Initiate the Replica Set. docker exec -it mongo1 mongosh --eval "r...