kchandan

hadoop jar /usr/lib/hadoop-0.20-mapreduce/contrib/streaming/hadoop-streaming-2.6.0-mr1-cdh5.12.0.jar \
-file /home/cloudera/mapper.py    -mapper /home/cloudera/mapper.py \
-file /home/cloudera/reducer.py   -reducer /home/cloudera/reducer.py \
-input /user/cloudera/*.py -output /user/cloudera/output

kchandan

from flask import Flask
from flask import request
import json
app = Flask(__name__)


@app.route('/')
def hello():
    return "Check Code of countries"

kchandan

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  
  config.vm.box = "geerlingguy/centos7"

  
  config.vm.network "forwarded_port", guest: 8080, host: 8080
  config.vm.network "public_network"

kchandan

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

kchandan

RKE2 commands

Install

curl -sL https://get.rke2.io | sh
systemctl daemon-reload
systemctl start rke2-server