Category: Software

Software

Setup VNC for remote access on Raspberry Pi

Most of the time, I’m using SSH to connect remotely with the Raspberry Pi. If you are more accustomed to a GUI, you can use VNC for remote access via the network. With VNC, you can access your Raspberry Pi’s GUI screen from a laptop or desktop computer using the same mouse, keyboard, and display of your own computer. Here’s the steps you need to do to setup a working VNC server/client to access your Raspberry Pi remotely. This is an tutorial done  on Raspbian OS.

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Configuring Elastic Load Balancer on Amazon EC2

Load balancers are used to distribute the requests/queries to multiple server instances. Most web infrastructures have multiple front-end servers that share the load of the application. Although there are multiple server instances, the end-user only see them a single node. In this tutorial, I’ll walk you on how to configure an Elastic Load Balancer on Amazon, add your web server nodes and point your domain name to the EC2 load balancer.

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Adding new disk on Amazon EC2 instance Centos/RHEL 6

Amazon VPS instances, by default only have a single disk for the whole filesystem of the server. Unless you chose to add an additional disk when you provision the server, adding disk space to your VPS can be tricky. Here’s a run down on how to add more storage to your server on amazon by mounting a new drive.

In this tutorial, I’ve mounted the new drive to /var/lib/mysql since I need to increase the disk space used by the database. This tutorial is still applicable even if you want to increase a different folder. The process will be the same.

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Install Gitblit Go on CentOS/RHEL 6/7

If you are a programmer or work with programmers, managing code repositories is one the task you’ll likely to encounter. Git has become widely popular for storing/managing code repositories.
Gitblit GO is an open-source, pure Java stack for managing, viewing, and serving Git repositories. It’s designed primarily as a tool for workgroups who want to host centralized repositories. Gitblit GO is an integrated, single-stack solution based on Jetty.
In this fast tutorial, you’ll be able to install GitBlit Go and create you own git repositories.
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Important MySQL commands

The following tutorials are example of the essential MySQL commands and techniques needed by system administrators. Although there are people/departments that specializes on Database administration, knowing these commands will help you understand and collaborate effectively with database administrators.
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Additional MySQL Commands

When you forgot the password to your MySQL server, you can reset it using the following steps. This will require a downtime since you are going to stop MySQL service. After this, remember to keep you mysql root password.

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DNS Server Setup for Centos 6 / RHEL 6

DNS stands for Domain Name System, or Domain Name Server. DNS resolves an IP address to a hostname or vice versa. This tutorials walks through the installation and setup of a Bind9 DNS server for Centos 6/RHEL 6. This is just for a master DNS server and setup of a slave is not covered.
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Setup NFS share in Linux

Network File System (NFS) is the standard protocol used for sharing files/folder between Linux/Unix systems. This is helpful on production environments that requires a common folder on multiple servers. NFS shares provide quick and efficient file/folder sharing between systems. It’s easy to configure and setup. It’s not compatible on windows machines though- you can Samba protocol for this. This tutorial is done on CentOS but will also work on Ubuntu and other Linux OS.
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