In my previous post I have shown you what playbook is, how to write and how you can run playbook. In this post I’ll show you another playbook which will be used for managing a Cisco router. I’ll use the below simple topology for this tutorial. (All files …
Hello everyone. In my last post I showed you how to install and configure ansible and run ad-hoc command. In this post I will show you how you can create and run ansible playbook. If you miss the first part you can find it here. I will use the …
Managing an infrastructure is a big challenge now a day. Most of the infrastructure is made of heterogeneous devices. To manage all these devices, you need special people and skill. To run all the device efficiently and to get the maximum benefits of those devices you have to build …
The Uncomplicated Firewall (ufw) is a front end for iptables and is a host based firewall. In this tutorial we will see how to enable and configure ufw firewall on Ubuntu system. Ubuntu 8.04 LTS introduced ufw, and it is available by default in all Ubuntu installations after 8.04 LTS. One …
Backup? Router Configuration!! Can you remember the last backup time of your router configuration? If somebody asks me the same question my answer will be no. Take backup periodically, take backup after and before any changes, store them in a remote location, those are the line I have seen in …
Those who are familiar with Linux system must know the top command. We can monitor our system usage by using top command like cpu, memory etc. There is another command which does the similar things like top, but instead of displaying the output in a raw text format, gtop produce …
Over the past decade virtualization technologies have gone from educational tools to full blown IT solutions. Virtualization has many benefits, among them application isolation and utilization of hardware resources are most valuable cause it gives more operational flexibility. Many organizations invest their money in virtualization technology. Virtual environment is easier …
iptables, The most common and widely used Linux firewall for IPv4 traffic. Like iptables, Linux has another firewall utility called ip6tables which is used for IPv6 traffic. These two tables need to configure separately for IPv4 and IPv6 packet. In this tutorial we will see how to configure ip6tables in Ubuntu …
The goal of the Information security is Confidentiality, Integrity and Availability are also known as CIA triad. The security people who are protecting, and the bad people who are breaking the security are actually trying to protect and break these three things. The best and easy example is a DDOS …
If you are a Linux user then you already know that in Linux everything is written in the file. A device in Linux is represented as a file, for configuring a service you have to edit lots of files like a mail server or a web server, even firewall information is …
