visvv

df -h * [Shows the disc usage]
df -sh * [Shows the dosc usage sorted]
du -sh dir_path/  [Shows the summary of folder size]
du -ah [Shows all files&folders in human readable format]
du -h note.txt [Shows the disc size of the file.]
du -a /etc/ | sort -n -r | head -n 10 [Show top 10 directories eating disc space] 


iostat -h sda 1 [Display all IO stat of sda in every 1 second with huma readable format]

visvv

df -h [Shows the disc usage]
du -sh dir_path/  [Shows the summary of folder size]
du -ah [Shows all files&folders in human readable format]
du -h note.txt [Shows the disc size of the file.]
du -a /etc/ | sort -n -r | head -n 10 [Show top 10 directories eating disc space] 

visvv

sudo usermod -aG docker ${USER}  // add current user to docker group 

visvv

public class Stack<T>{

     private Node<T> head;
     
     public void push(T data){
         if(this.head == null){
	    this.head = new Node<>(data);
	 }else{
              Node<T> node = new Node<>(data);
	      node.next = this.head;

visvv

Class Main {
	public void bfs()
	{
		// BFS uses Queue data structure
		Queue queue = new LinkedList();
		queue.add(this.rootNode);
		printNode(this.rootNode);
		rootNode.visited = true;
		while(!queue.isEmpty()) {
			Node node = (Node)queue.remove();

visvv

version: '2'
services:
  gateway:
    image: "gcr.io/theloud-165302/mobile-frontend-gateway"
    ports:
     - "5000:5000"
    volumes:
     - .:/code
  keycloack:
    image: "jboss/keycloak-postgres"

visvv

Add user to the sudoers
// in ubunut
usermod -aG sudo username  

// centos 
usermod -aG wheel username

visvv

SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname = 'TARGET_DB'
  AND pid <> pg_backend_pid();

visvv

apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: nginx-deployment
spec:
  replicas: 1 # tells deployment to run 1 pods matching the template
  template: # create pods using pod definition in this template
    metadata:
      # unlike pod-nginx.yaml, the name is not included in the meta data as a unique name is
      # generated from the deployment name

visvv

import java.util.logging.*;

def logger = Logger.getLogger("sample_logger");
def fileHandler = new FileHandler("sample_logger.log", true);
// custome formatter to log only the message. 
fileHandler.setFormatter( { record -> record.message });
logger.addHandler(fileHandler)
logger.info('hi there....')