How To Install an SSL Certificate from a Commercial Certificate Authority
Sunday, July 5, 2015
How To Set Up an OpenVPN Server on Ubuntu 14.04
Introduction
Want to access the Internet safely and securely from your smartphone or laptop when connected to an untrusted network such as the WiFi of a hotel or coffee shop? A Virtual Private Network (VPN) allows you to traverse untrusted networks privately and securely to your DigitalOcean Droplet as if you were on a secure and private network. The traffic emerges from the Droplet and continues its journey to the destination.
Friday, July 3, 2015
How To Set Up Automatic Deployment with Git with a VPS
Introduction
For an introduction to Git and how to install, please refer to the introduction tutorial.
This article will teach you how to use Git when you want to deploy your application. While there are many ways to use Git to deploy our application, this tutorial will focus on the one that is most straightforward. I assume you already know how to create and use a repository on your local machine. If not, please refer tothis tutorial.
How To Set Up Apache Virtual Hosts on Ubuntu 14.04 LTS
Introduction
The Apache web server is the most popular way of serving web content on the internet. It accounts for more than half of all active websites on the internet and is extremely powerful and flexible.
How To Install Linux, Apache, MySQL, PHP (LAMP) stack on Ubuntu 14.04
Introduction
A "LAMP" stack is a group of open source software that is typically installed together to enable a server to host dynamic websites and web apps. This term is actually an acronym which represents the Linux operating system, with the Apache web server. The site data is stored in a MySQL database, and dynamic content is processed by PHP.
In this guide, we'll get a LAMP stack installed on an Ubuntu 14.04 Droplet. Ubuntu will fulfill our first requirement: a Linux operating system.
Understanding the Nginx Configuration File Structure and Configuration Contexts
Introduction
Nginx is a high performance web server that is responsible for handling the load of some of the largest sites on the internet. It is especially good at handling many concurrent connections and excels at serving static content.
Additional Recommended Steps for New Ubuntu 14.04 Servers
Introduction
After setting up the bare minimum configuration for a new server, there are some additional steps that are highly recommended in most cases. In this guide, we'll continue the configuration of our servers by tackling some recommended, but optional procedures.
Thursday, July 2, 2015
Initial Server Setup with Ubuntu 14.04
Introduction
When you first create a new Ubuntu 14.04 server, there are a few configuration steps that you should take early on as part of the basic setup. This will increase the security and usability of your server and will give you a solid foundation for subsequent actions.
Understanding Nginx HTTP Proxying, Load Balancing, Buffering, and Caching
Introduction
In this guide, we will discuss Nginx's http proxying capabilities, which allow Nginx to pass requests off to backend http servers for further processing. Nginx is often set up as a reverse proxy solution to help scale out infrastructure or to pass requests to other servers that are not designed to handle large client loads.
Along the way, we will discuss how to scale out using Nginx's built-in load balancing capabilities. We will also explore buffering and caching to improve the performance of proxying operations for clients.
How To Install Linux, nginx, MySQL, PHP (LEMP) stack on Ubuntu 14.04
Introduction
The LEMP software stack is a group of software that can be used to serve dynamic web pages and web applications. This is an acronym that describes a Linux operating system, with an Nginx web server. The backend data is stored in MySQL and the dynamic processing is handled by PHP.
In this guide, we will demonstrate how to install a LEMP stack on an Ubuntu 14.04 server. The Ubuntu operating system takes care of the first requirement. We will describe how to get the rest of the components up and running.
How To Set Up Nginx Server Blocks (Virtual Hosts) on Ubuntu 14.04 LTS
Introduction
When using the Nginx web server, server blocks (similar to the virtual hosts in Apache) can be used to encapsulate configuration details and host more than one domain off of a single server.
In this guide, we'll discuss how to configure server blocks in Nginx on an Ubuntu 14.04 server.
server blocks (similar to the virtual hosts in Apache) can be used to encapsulate configuration details and host more than one domain off of a single server.How To Set Up SSH Keys
About SSH Keys
SSH keys provide a more secure way of logging into a virtual private server with SSH than using a password alone. While a password can eventually be cracked with a brute force attack, SSH keys are nearly impossible to decipher by brute force alone. Generating a key pair provides you with two long string of characters: a public and a private key. You can place the public key on any server, and then unlock it by connecting to it with a client that already has the private key. When the two match up, the system unlocks without the need for a password. You can increase security even more by protecting the private key with a passphrase.
How To Add Swap on Ubuntu 14.04
Introduction
One of the easiest way of increasing the responsiveness of your server and guarding against out of memory errors in your applications is to add some swap space. Swap is an area on a hard drive that has been designated as a place where the operating system can temporarily store data that it can no longer hold in RAM.
Wednesday, July 1, 2015
How To Set Up a Firewall Using IPTables on Ubuntu 14.04
Introduction
Setting up a good firewall is an essential step to take in securing any modern operating system. Most Linux distributions ship with a few different firewall tools that we can use to configure our firewalls. In this guide, we'll be covering the iptables firewall.
How To Use NSD, an Authoritative-Only DNS Server, on Ubuntu 14.04
Introduction
Setting up a DNS server to be responsible for domain names can be a complex task even for seasoned administrators. DNS zone management is a vital duty, but can be bewildering, especially when attempting to get started.
Software like the Bind DNS server is incredibly flexible and can be configured to operate as many of the components in the overall DNS hierarchy. However, that flexibility also means that Bind is not optimized for any one task. This has a few side effects.
How To Configure BIND as a Private Network DNS Server on Ubuntu 14.04
Introduction
An important part of managing server configuration and infrastructure includes maintaining an easy way to look up network interfaces and IP addresses by name, by setting up a proper Domain Name System (DNS). Using fully qualified domain names (FQDNs), instead of IP addresses, to specify network addresses eases the configuration of services and applications, and increases the maintainability of configuration files. Setting up your own DNS for your private network is a great way to improve the management of your servers.
How To Configure Bind as an Authoritative-Only DNS Server on Ubuntu 14.04
Introduction
DNS, or the Domain Name System, is often a difficult component to get right when learning how to configure websites and servers. While most people will probably choose to use the DNS servers provided by their hosting company or their domain registrar, there are some advantages to creating your own DNS servers.
How To Configure Bind as a Caching or Forwarding DNS Server on Ubuntu 14.04
Introduction
DNS, or the Domain Name System, is often a difficult component to get right when learning how to configure websites and servers. While most people will probably choose to use the DNS servers provided by their hosting company or their domain registrar, there are some advantages to creating your own DNS servers.
How To Set Up a Host Name with DigitalOcean
DigitalOcean’s DNS allows you to easily set up your hostname from the DigitalOcean control panel.
Setup
Before you get started, you do need to have the following:
- A Droplet (virtual private server) from DigitalOcean. If you don’t have one, you can register and set one up in under a minute
- A Registered Domain Name. As of yet, you cannot register a domain through DigitalOcean.
A Comparison of DNS Server Types: How To Choose the Right DNS Configuration
Introduction
DNS, or the Domain Name System, is an integral part of how systems connect with each other to communicate on the internet. Without DNS, computers, and the people who use them, would be required to connect using only numerical addresses known as IP addresses.
An Introduction to DNS Terminology, Components, and Concepts
Introduction
DNS, or the Domain Name System, is often a very difficult part of learning how to configure websites and servers. Understanding how DNS works will help you diagnose problems with configuring access to your websites and will allow you to broaden your understanding of what's going on behind the scenes.
How To Create a New User and Grant Permissions in MySQL
About MySQL
MySQL is an open source database management software that helps users store, organize, and later retrieve data. It has a variety of options to grant specific users nuanced permissions within the tables and databases—this tutorial will give a short overview of a few of the many options.
How To Install Wordpress on Ubuntu 14.04
Introduction
At this time, WordPress is the most popular CMS (content management system) on the internet. It allows you to easily set up flexible blogs and websites on top of a MySQL backend with PHP processing. WordPress has seen incredible adoption and is a great choice for getting a website up and running quickly.
In this guide, we'll focus on getting a WordPress instance set up with an Apache web server on Ubuntu 14.04.
How To Install Java on Ubuntu with Apt-Get
Introduction
As a lot of articles and programs require to have Java installed, this article will guide you through the process of installing and managing different versions of Java.
How To Install and Secure phpMyAdmin on Ubuntu 14.04
Introduction
While many users need the functionality of a database management system like MySQL, they may not feel comfortable interacting with the system solely from the MySQL prompt.
phpMyAdmin was created so that users can interact with MySQL through a web interface. In this guide, we'll discuss how to install and secure phpMyAdmin so that you can safely use it to manage your databases on Ubuntu 14.04.
5 Ways to Improve your Production Web Application Server Setup
Introduction
Once your application is up and running in a cloud server environment, you may be wondering how you can improve your server environment to make the leap from "it works" to a full-fledged production environment. This article will help you get started with planning and implementing a production environment by creating a loose definition of "production", in the context of a web application in a cloud server environment, and by showing you some components that you can add to your existing architecture to make the transition.
An Introduction to Securing your Linux VPS
Introduction
Taking control of your own Linux server is an opportunity to try new things and leverage the power and flexibility of a great platform. However, Linux server administrators must take the same caution that is appropriate with any network-connected machine to keep it secure and safe.
There are many different security topics that fall under the general category of "Linux security" and many opinions as to what an appropriate level of security looks like for a Linux server.
A Basic MySQL Tutorial
About MySQL
MySQL is an open source database management software that helps users store, organize, and retrieve data. It is a very powerful program with a lot of flexibility—this tutorial will provide the simplest introduction to MySQL
How to Install MySQL on Ubuntu and CentOS
If you don't have MySQL installed on your droplet, you can quickly download it.
How To Configure a Mail Server Using Postfix, Dovecot, MySQL, and SpamAssassin
Introduction
In this tutorial, we are going to configure a mail server using Postfix, Dovecot, MySQL and SpamAssassin on Ubuntu 12.04.
Following this tutorial you'll be able to add virtual domains, users, and aliases. Moreover, your virtual server will be secure from spam hub.
How To Setup Your Own VPN With PPTP
Intro
One of the commonly asked questions from our users is how to add another IP address to their server. You can assign your own private IP address to your droplet by creating a VPN tunnel. Whether you want to build your own Virtual Private Network (VPN), or assign an SSL certificate to that IP address, you have several options. From all of the possible options, the most optimal ones are between PPTP and OpenVPN. A Point-To-Point Tunneling Protocol (PPTP) allows you to implement your own VPN very quickly, and is compatible with most mobile devices. Even though PPTP is less secure than OpenVPN, it is also faster and uses less CPU resources.
DNS Server - 2 Set Zone
Create zone files that servers resolve IP address from domain name
For internal zone
This example uses internal address[10.0.0.0/24], domain name[server.world], but please use your own one when you set config on your server.
For internal zone
This example uses internal address[10.0.0.0/24], domain name[server.world], but please use your own one when you set config on your server.
SSH Server CentOS 7
Configure SSH Server - Password Authentification
Configure SSH Server to manage a server from the remore computer. SSH uses 22/TCP
SSHd is installed even if you installed CentOS with "Minimal Install", so it's not necessarry to install new packages. Furthermore, SSHd is set auto-start setting by default, so it's possible to login without chainging ant settings. But it had better to change for security settings like follows
Configure SSH Server to manage a server from the remore computer. SSH uses 22/TCP
SSHd is installed even if you installed CentOS with "Minimal Install", so it's not necessarry to install new packages. Furthermore, SSHd is set auto-start setting by default, so it's possible to login without chainging ant settings. But it had better to change for security settings like follows
