Resize a Linux Root Partition Without Rebooting

Introduction Its a very common occurance that i may need to increase the disk size on a VM. In the following example we have a disk that is divided into two partitions. The first one, /dev/vda1, is the boot partition where the OS resides. The second partition, /dev/vda2,

How to access Amazon S3 cloud storage from command line in Linux

Amazon S3 is a cloud storage provided by Amazon Web Services (AWS). Amazon S3 publishes a set of web services interfaces, upon which many third-party commercial services or client software are developed. In this tutorial, I will describe how to access Amazon S3 cloud storage from the command line in

Installing postal on Ubuntu 16.04 Server

Postal is a complete and fully featured mail server for use by websites & web servers.It used be called Appmail but then the project closed and went open source. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers. Postal was developed

Installing Zabbix 3.2 on Debian Jessie

Zabbix is enterprise open source monitoring software for networks and applications, created by Alexei Vladishev. It is designed to monitor and track the status of various network services, servers, and other network hardware. Zabbix uses MySQL, PostgreSQL, SQLite, Oracle or IBM DB2 to store data.[2] Its backend is written

Installing Rocket.Chat on Debian 8

Rocket.Chat is a free/open source software for team collaboration. It is a full featured platform and an ideal alternative to Slack, for organizations that are dedicated to the Free Software philosophy. In this guide we will demonstrate how you can setup Rocket.Chat for your organization. Prerequisites: * A

Installing Drupal with CIVIcrm On Debian 8 and using AWS S3 backup

The following guide is for installing Drupal 7 wuth CIVIcrm on Debian Jessie. I will be using Nginx as the web server and I will show you how to generate letsencrypt certificates and autorenew them. As an added bonus i will also show teh steps necessary to use the backup

How to Clear RAM Memory Cache, Buffer and Swap Space on Linux

Like any other operating system, GNU/Linux has implemented a memory management efficiently and even more than that. But if any process is eating away your memory and you want to clear it, Linux provides a way to flush or clear ram cache. Clear RAM Cache and Swap in Linux

AWS - Certified Solutions Architect (NOTES)

AWS Certified Solutions Architect – Associate Study Notes – I' currently studying to sit the AWS Solutions Architect Associate certification. To do this I'm (a) going through the exam blueprint, (b) writing blogs on my AWS free-tier lab, (c) watching the excellent videos. I bought the "Associate Bundle" so I plan on

Installing php-list and postfix for reliable e-mail campaigns

Installing php-list The purpose behind this turorial is to install php-list which is used for sending email campaigns, but insted of using php-list scripts to send emails to configure postfix to do the job. The reason i wanted to do this is so i could implement DKIM and DMARC (using

Rancher OS - The perfect place to run Docker

On my quest to learn more about Docker I came across Rancher OS. I had herd (cheeky) of it a while back but it was only yesterday evening when I decided to sit down and actually take a look and read what it's all about. Its essentially a 20MB Linux

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Learning Docker

I finally decided to learn docker, being a fun of linux academy tutorials it was a no-brainer to go through their docker training. Unfortunately they don't have any notes to accompany the video training, so i decided to write my own and publish it hopefully it will help others going

Installing Gitlab on Digital Ocean with LDAP and Letsencrypt

In this guide I am installing gitlab on a virtual server hosted at digital ocean. The server only has 512mb of ram which is well below the recommended 2GB . I will be using swap to allow for the installer to finish.If you will be setting up gitlab for more

Installing Phabricator

Phabricator is a complete set of tools for developing software. Included apps help you manage tasks and sprints, review code, host git, svn, or mercurial repositories, build with continuous integration, review designs, discuss in internal chat channels, and much more. It's fast, scalable, and fully open source. Install it locally

Install Proxmox 4.2 VE on a Hetzner server

With the release of Proxmox 4.2 we are getting IPv6 support including LXC containers. This comes at the cost of OpenVZ container (unless you want to install custom patches) but I feel it’s a step in the right direction. Over the past week we got a new Hetzner

Installing Devstack

One of the first thibgs you need to do once you decide its time to learn openstack is to install devstack on your system so that you can begin to play around with it. There are a few options to get devstack running. One is installing it on virtualbox and

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Installing taiga.io on Debian Jessie

Taiga is a project management application that can handle both simple and complex projects for startups, software developers, and other target teams. It tracks the progress of a project. Taiga's design is clean and elegant design—something that is supposed to be “beautiful to look at all day long.” With

Simple Vagrant

/>Intro to Vagrant Because I quite often like to test different applications locally, I use virtualbox a lot. I have recently found that using Vagrant can simplify the deployment of setting up a local development environment and replaces it with almost a single config file where you can pick and

Building a Docker Web Farm for Development and Testing

In this guide i will describe how you can build a docker containerized web server from scratch using the individual concepts we have covered. Once this is complete, we will add services and commit the container to another base image we can use to further customize our web server instances.

Getting started with Chef using examples

Introduction Chef is a configuration management system designed to allow you to automate and control vast numbers of computers in an automated, reliable, and scalable manner. This new concept is called infrastructure as code.There are plenty of tutorials on Chef and the actual chef website provides very good documentation

How to eliminate spam and protect your name with DMARC DKIM and SPF

If you are reading this you are probably making my life harder E-Mail sucks! Your users just keep clicking the links in those damn phishing mails. And you can’t do anything about it. Hell somebody might be sending spam in your name and you have no idea about it.

VestaCP DNS Cluster Setup

DNS cluster setup scripts that come with VestaCP.It's really simple to setup, and there are literally no limits on the number of servers you can add to the DNS cluster.All you need to do isOn top of your default admin user, create a user called dns-cluster on the

VestaCP spamassasin and exim4 fix

This is a short post that id like to share since i couldnt find the info in vestacp documents. Vesta control panel is a very nice and easy to use open source control panel with website, email, database, and DNS functionalities built in. If you wish to find out how

Installing MariaDB Galera Cluster

How To Configure a Galera Cluster with MariaDB on Ubuntu 12.04 Servers Introduction When dealing with relational database systems in a production environment, it is often best to have some kind of replication procedures in place. Replication allows your data to be transferred to different nodes automatically.A simple

Installing and maintaining reprepro on Ubuntu

Reprepro Reprepro (formerly having the working title mirrorer) is a tool to handle local repositories of debian packages. * local addition of files or automatically getting them from some remote repository * files are stored in a pool/-hirachy * uses libdb4.x, so no database-server is need, but information is stored in

Shrink a Linux partition to create Swap space

I am an owner of a Utilite ARM computer [http://www.compulab.co.il/utilite-computer/web/utilite-overview]. One of the issues I experienced with the default setup, is that there is no swap partition [https://help.ubuntu.com/community/SwapFaq]. That causes Firefox some memory hungry applications to perform badly.