Install Ubuntu Updates + Apps

    $ sudo apt-get update
    $ sudo apt-get upgrade -y
    $ sudo apt-add-repository -y ppa:cappelikan/ppa
    $ sudo add-apt-repository ppa:danielrichter2007/grub-customizer
    $ sudo apt-get install -y apt-transport-https ca-certificates curl ssh xauth mainline grub-customizer docker.io build-essential linux-headers-generic xorg x11-apps
    # I am installing required dependencies for kubernetes,x11,docker,kernel
    $ sudo swapoff -a
    $ sudo nano /etc/fstab (comment out swap.img)

Complete Network Config

Your network interface will most likely be enp0s3 or ethX or wlan0 or ensXX (DO NOT CHANGE lo INTERFACE AS IT CAN CAUSE FAILURE OF CONNECTION LOCALHOST APPS TO OTHER PORT APPS)

    $ sudo ifconfig NETWORK_INTERFACE YOUR_IP netmask SUBNET_MASK
    $ sudo route add default gw DEFAULT_GATEWAY

Install Kernel 6.3 (MANDATORY FOR NETWORK + VM RESIZING - VBox_GAs_6)

    # Identify which kernel version is running
    $ uname -r
    6.5.0-14-generic

    $ sudo apt update
    # Start | "Mainline Kernels" and install kernel 6.3

    # Show grub bootmenu to boot the newly installed kernel
    $ sudo gedit /etc/default/grub
        #GRUB_TIMEOUT_STYLE=hidden
        GRUB_TIMEOUT_STYLE=menu
	    
        #GRUB_TIMEOUT=0
        GRUB_TIMEOUT=5
		
    $ sudo update-grub
    $ sudo reboot now
	
    # From the Grub boot menu, select Advanced options for Ubuntu | Ubuntu, with Linux 6.3.0-060300-generic | Enter
    # Check running kernel
    $ uname -r
    6.3.0-060300-generic
	
    # Mount VirtualBox guest additions ISO and reinstall
    # Make sure that gcc-12 is installed, otherwise the installation will fail
    $ cd /media//media/a/VBox_GAs_6.1.XX/
    $ sudo ./VBoxLinuxAdditions.run
    $ sudo reboot now
    # When problem is solved, change Grub bootmenu permanently
    $ grub-customizer

    # Tab General Settings | predefined: Advanced options for Ubuntu>Ubuntu, with Linux 6.3.0-060300-generic | Save
    # reboot

Install Docker and Kubernetes

    $ sudo mkdir /etc/apt/keyrings
    $ sudo usermod -aG docker $USER && newgrp docker
    $ curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.30/deb/Release.key | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
    $ echo 'deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /' | sudo tee /etc/apt/sources.list.d/kubernetes.list
    $ sudo apt-get update && sudo apt-get upgrade
    $ sudo apt-get install -y kubelet kubeadm kubectl

Kubernetes Setup(Only if using separate servers/machines for running Worker/Master Nodes)

    $ sudo kubeadm init
    # Here Kubeadm will give you an cluster-joiner key/ token (Copy it)
    $ kubectl get nodes(to check node status , dont worry if you see not ready :)
    $ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
				OR
    $ kubectl create -f https://raw.githubusercontent.com/projectcalico/calico/v3.28.0/manifests/calico.yaml
				OR
    $ kubectl apply -f https://github.com/flannel-io/flannel/releases/latest/download/kube-flannel.yml

Steps to set up Kubernetes on the worker nodes.

    # Paste the cluster-joiner token/key , It should look something like the command below (x's need to be replace with ip given by kubeadm and the token part with the token)
    $ kubeadm join xxx.xxx.xxx.xxx --token xxxxxxx \ -discovery-token-ca-cert-hash

Minikube Setup (For Single VM Development)

    $ curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube_latest_amd64.deb
    $ sudo dpkg -i minikube_latest_amd64.deb
    $ minikube start

Terraform Install

    $ wget -O- https://apt.releases.hashicorp.com/gpg | sudo gpg --dearmor -o /usr/share/keyrings/hashicorp-archive-keyring.gpg
    $ echo "deb [signed-by=/usr/share/keyrings/hashicorp-archive-keyring.gpg] https://apt.releases.hashicorp.com $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/hashicorp.list
    $ sudo apt update && sudo apt install terraform
    $ terraform --version