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Firewalld, if included in RHEL 7, is a replacement for iptables and is being included as default. Some benefits include not needing to restart the firewall when changes are made, which means your system maintains its firewall during rule modification, and current connections are not lost.

Anyhow, if you are not willing to migrate to Firewalld and want to use iptables as default, follow these steps:

Install iptables service:

yum install -y iptables-services

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Installing Kerberos on Redhat 7

This installation is going to require 2 servers one acts as kerberos KDC server and the other machine is going to be client. Lets assume the FQDN's are (here cw.com is the domain name, make a note of the domain name here):

• Kerberos KDC Server: kdc.cw.com
• Kerberos Client: kclient.cw.com

Important: Make sure that both systems have their hostnames properly set and both systems have the hostnames and IP addresses of both systems in

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Installing ELK (CentOS)

This is a short step-by-step guide on installing ElasticSearch LogStash and Kibana Stack on a CentOS environment to gather and analyze logs.

I. Install JDK

rpm -ivh https://dl.dropboxusercontent.com/u/5756075/jdk-7u45-linux-x64.rpm

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#!/bin/sh

# Some things taken from here
# https://github.com/mathiasbynens/dotfiles/blob/master/.osx

# Set the colours you can use
black='\033[0;30m'
white='\033[0;37m'
red='\033[0;31m'
green='\033[0;32m'

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1. cd into the forked repository directory that you want to update

    cd repository_dir
   

2. Add a new remote to point to the original repository

    git remote add upstream git://github.com/author/project.git
   

3. Pull the new commits from the original repo

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# RPM
wget --no-check-certificate \
     --no-cookies \
     --header "Cookie: oraclelicense=accept-securebackup-cookie" \
     http://download.oracle.com/otn-pub/java/jdk/7u45-b18/jdk-7u45-linux-x64.rpm \
     -O jdk-7u45-linux-x64.rpm

# TAR GZ
wget --no-check-certificate \
     --no-cookies \

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Install puppet server and clients

Puppet Server

curl -s https://raw.githubusercontent.com/cloudwicklabs/scripts/master/puppet_install.sh | bash /dev/stdin -s -a -v

Puppet Client

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import scala.annotation.tailrec

object fact {
  // n! = n * (n-1) * (n-2) * ... * 2 * 1
  // n! = if (n>1) n * (n-1)! else 1

  def factorial(n: Int): Int =
    if (n > 1)
      n * factorial(n - 1)
    else

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[enter]~.

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#!/bin/bash

users_with_pwd=$(awk -F":" '!($2 == "" || $2 == "!!" || $2 == "*") {print $1}' /etc/shadow)
users_logged_in=$(who | awk '{print $1}' | uniq)

echo "[*] Users with password: "
for user in ${users_with_pwd}; do
  echo $user
done