Deploying a cloud solution like OpenStack is hard. You have to install different services on different server, perform many different functions to orchestrate the cloud. It is a common question for those who wants to deploy OpenStack that how to start? How can I ensure that everything is in order or every component …
Hello everyone. Today I’ll show you how to implement 2 factor authentication for SSH on Ubuntu 16.04 server using the Google Authenticator app. We will use ssh key (1st factor) and a randomly generate code (2nd factor) by Google Authenticator to login to our Ubuntu server. I use Amazon EC2 …
hello everyone. Today I will show you how to login Cisco router using ssh key. We will enable ssh on the router and then generate a key on an Ubuntu Linux server and using that key we will login to our router. The process is easy, lets start. Change the …
In my previous article (“How to automate your IT infrastructure with puppet“) I showed you how to install and configure puppet, and how to write simple manifest.Today I’ll show you how to write those simple manifest using puppet classes and modules using the same server environment. What is class and …
A serious bug has been detected recently in Linux kernel named Dirty COW (CVE-2016-5195). An unprivileged local user can use this flaw to gain write access in the system. The bug existed since around 2.6.22+ (release in 2007) and was fixed on Oct 18, 2016. Exploitation of this bug does …
Hello everyone. In my previous article named “One puppet to rule them all“, I told you about what puppet is and how it works. if you miss the first part you can find it here. In this part i’ll show you the installation and configuration of Puppet. In real life …
In system administration every system administrator performs some similar jobs in their own domain. like managing user account, update patches, configure firewall, install software, etc. No matter how small or big your environment is you have to perform this type of activity in your environment frequently. For opening a user …
Topic Covered AWS Free tier which include 750 hours per month instance usage. 30 GB of storage. Expire 12 months after sign-up. You can find more information here about AWS free tire. Prerequisite Before launching To launch an instance in AWS first you need to sign-up or open an account. …
Almost all nix administrator use ssh (Secure shell) for managing server remotely. There are several way to use ssh. One of them is to use a manually generated public-private key pair to perform the authentication. In this tutorial I’ll show you how to create that public private key and use …
