How To Generate SSL Certificate Signing Request (CSR) in Linux

A Certificate Signing Request (CSR) is an intermediate form of an SSL certificate that enables a Certificate Authority (CA) to generate a signed SSL certificate and verify the identity of a domain’s owner. A CSR is an

How to Install Ruby 2.2.4 on CentOS/RHEL with RVM

Ruby 2.2.4 is a dynamic, object-oriented programming language.We are using RVM, which stands for Ruby Version Manager. RVM is a command-line tool which allows you to easily install, manage and work with multiple ruby version of Ruby

How to Install Samba 4.3.4 on CentOS/RHEL 7

Samba is a free Open Source software which provides a standard interoperability between Windows OS and Linux/Unix Operating Systems. Major features for Samba4: 1) Support for the ‘Active Directory’ logon and administration protocols that support Windows XP,

Puppet vs. Chef vs. Ansible vs. SaltStack

Puppet, Chef, Ansible, and Salt were all built to make it much easier to configure and maintain more than hundred of servers. It’s not mean that smaller companies won’t take benefit of these tools, as automation and

What is Puppet Management Tool and It’s Benefits

Puppet is made by Luke Kanies. It’s based on ruby language. Currently Puppet is upheld by Puppet Labs and Luke Kanies is the CEO of Puppet Labs. Puppet is a tool manage to deal with the configuration

Configuring Gmail as a Sendmail Email Relay

In this tutorial we will help you the configuration process of configuring Gmail as a Sendmail Email Relay. Install Prerequisites: Before configuring gmail as a sendmail email relay make sure all required packages has been installed on

How to Setup Mail Forwarding in Postfix Linux

Postfix is a commonly used MTA (Mail Transfer Agent) program that can receive, deliver or route emails. Postfix can be configured as mail forwarding domains server using virtual_alias_maps settings. The main purpose is to forward mail elsewhere.

How to Install MongoDB 3.4 on Ubuntu 16.04/14.04

MongoDB is a NoSQL database that offers a high performance, high availability, and automatic scaling enterprise database. NoSQL refers to a database with a data model other than the tabular format used in relational databases such as

Linux Firewall – Basic Guide of IPTables

iptables (Linux Firewall) is a command-line firewall utility that uses policy chains to allow or block traffic. iptables is a rule based firewall and it is pre-installed on most of Linux operating system. By default it runs

How To Create SSH Keys on a Linux

SSH (Secure Shell) is an encrypted protocol used to administer and communicate with servers. SSH keys provide a more secure way of logging into a linux server. While a password stands the risk of being finally cracked,