Breaking up an ansible playbook with tasks, variables, configuration templates and other supporting files is called a role. A role can be used independently, but have to be used within playbook. It has its own directory structure. Roles in ansible are very robust and you can re-use it once created. In …
Ansible is an open source configuration management tool, and is popular for provision infrastructure. In this blog post I’ll show you how easily you can spin up multiple droplets in DigitalOcean. The full code can be downloaded from here. Prerequisite Ansible should be installed on your host and you should …
SPAM (or more specifically phishing) email is the most popular and effective weapon of cyber attack now a day. What is the first thing people do after receiving a spam email? Some got caught in the spammer net, some ignore it, some deletes the email, but as a security enthusiast …
Docker, the most popular container technology nowadays. By nature it’s an application container, means if you want apache you will get apache inside your container. Or if you want to run mysql inside your container its mysql only. Got the picture? Cool. In this post I ll show you …
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 …
