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Today I've solved the problem of one server being to slow to handle the growth of my zabbix configuration. I'm using zabbix-server 2.2.2 with MySQL/Debian backend and around 20 zabbix-agents with Debian installed.

Let's say old Zabbix server IP is: A.B.C.D and new is: U.X.Y.Z. The domain name for the instalation will be: http://zbx.newmachine.com

Below you will find all steps to migrate your configuration:

Ensure all agents will accept connections from the new IP Modify each agent configuration file (in debian: /etc/zabbix/zabbix_agentd.conf) and add new IP

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#!/usr/bin/env python3
# Use: ./subnet.py <ip/cidr>
# Alt: ./subnet.py <ip> <mask>

import sys

if __name__=="__main__":
    addr = [0, 0, 0, 0]
    mask = [0, 0, 0, 0]
    cidr = 0

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This document is under construction, but is intended to get you up and running quickly with cracking hashes in the cloud using the Paperspace service.

Resources used for this article:

• https://samiux.blogspot.com/2017/12/howto-install-hashcat-on-ubuntu-16043.html

• https://hashcat.net/wiki/doku.php?id=linux_server_howto

Setting up a cracking box using Paperspace

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---
- hosts: localhost
  gather_facts: no
  vars_files:
    - vcenter_vars.yml
  vars:
    hostname: kickstart_vm
  tasks:
  - name: Boot VM with CentOS 7 installation iso in CDROM
    vmware_guest:

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---
- hosts: localhost
  gather_facts: no
  vars_files:
    - vcenter_vars.yml
  vars:
    hostname: kickstart_vm
  tasks:
  - name: Boot VM with CentOS 7 installation iso in CDROM
    vmware_guest:

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# this is a copay/paste combination of https://gist.github.com/nictuku/13afc808571e742d3b1aaa0310ee8a8d & https://gist.github.com/Rahul91/f051a391fac62ccebb581370b0ac644d

# so that we can install virtualbox via apt-get
for x in xenial xenial-security xenial-updates; do 
  egrep -qe "deb-src.* $x " /etc/apt/sources.list || echo "deb-src http://archive.ubuntu.com/ubuntu ${x} main universe" | sudo tee -a /etc/apt/sources.list
done
echo "deb http://download.virtualbox.org/virtualbox/debian xenial contrib" | sudo tee -a /etc/apt/sources.list.d/virtualbox.list
wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -

# allow us to make a kernel

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# Bash best practices and style-guide

Just simple methods to keep the code clean.

Inspired by [progrium/bashstyle](https://github.com/progrium/bashstyle) and [Kfir Lavi post](http://www.kfirlavi.com/blog/2012/11/14/defensive-bash-programming/).


## Quick big rules
* All code goes in a function
* Always double quote variables

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#!/bin/bash

# get latest docker compose released tag
COMPOSE_VERSION=$(curl -s https://api.github.com/repos/docker/compose/releases/latest | grep 'tag_name' | cut -d\" -f4)

# Install docker-compose
sh -c "curl -L https://github.com/docker/compose/releases/download/${COMPOSE_VERSION}/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose"
chmod +x /usr/local/bin/docker-compose
sh -c "curl -L https://raw.githubusercontent.com/docker/compose/${COMPOSE_VERSION}/contrib/completion/bash/docker-compose > /etc/bash_completion.d/docker-compose"

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A curated list of AWS resources to prepare for the AWS Certifications

A curated list of awesome AWS resources you need to prepare for the all 5 AWS Certifications. This gist will include: open source repos, blogs & blogposts, ebooks, PDF, whitepapers, video courses, free lecture, slides, sample test and many other resources.

---

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echo "$STRING" | iconv -t ascii//TRANSLIT | sed -r s/[^a-zA-Z0-9]+/-/g | sed -r s/^-+\|-+$//g | tr A-Z a-z