How to set up a system status page of your infrastructure

If you are a system administrator who is responsible for critical IT infrastructure or services of your organization, you will understand the importance of effective communication in your day-to-day tasks. Suppose your production storage server is on fire. You want your entire team on the same page in order to resolve the issue as fast […]
Continue reading…

 

How to configure virtual hosts in Apache HTTP server

Virtual hosting refers to the technique that allows a physical server to host more than one website domain (e.g., site1.com, site2.com). Virtual hosting is prevalent in shared web hosting environments, where typically hundreds or more of websites or blogs are packed on a single dedicated server to amortize server maintenance cost. You are not a […]
Continue reading…

 

How to migrate MySQL to MariaDB on Linux

Since the Oracle’s acquisition of MySQL, a lot of MySQL developers and users moved away from MySQL due to Oracle’s more closed-door stance on MySQL development and maintenance. The community-driven outcome of such movement is a fork of MySQL, called MariaDB. Led by original MySQL developers, the development of MariaDB follows the open-source philosophy and […]
Continue reading…

 

How to combine two graphs on Cacti

Cacti is a fantastic open source network monitoring system that is widely used to graph network elements like bandwidth, storage, processor and memory utilization. Using its web based interface, you can create and organize graphs easily. However, some advanced features like merging graphs, creating aggregate graphs using multiple sources, migration of Cacti to another server […]
Continue reading…

 

How to replicate a MySQL database on Linux

Database replication is a technique where a given database is copied to one or more locations, so that the reliability, fault-tolerance or accessibility of the database can be improved. Replication can be snapshot-based (where entire data is simply copied over to another location), merge-based (where two or more databases are merged into one), or transaction-based […]
Continue reading…

 

What are good open-source log monitoring tools on Linux

In an operating system, logs are all about keeping track of events, be it critical system errors, resource usage warnings, transaction history, application status, or user activities. These logs, which are stored as (text or binary) files in the system, are useful for system auditing, debugging and maintenance. However, with so many different system entities […]
Continue reading…

 

How to manage remote MySQL databases on Linux VPS using a GUI tool

If you need to run a MySQL server on a remote VPS instance, how will you manage databases hosted by the server remotely? Perhaps web-based database administration tools such as phpMyAdmin or Adminer will first come to mind. These web-based management tools require a backend web server and PHP engine up and running. However, if […]
Continue reading…

 

How to secure BGP sessions using authentication on Quagga

The BGP protocol runs over TCP, and as such, it inherits all the vulnerabilities of a TCP connection. For example, within a BGP session, an attacker may impersonate a legitimate BGP neighbor, and convince the BGP routers on the other end to share their routing information with the attacker. The problem occurs when the attacker […]
Continue reading…

 

How to set up server monitoring system with Monit

Many Linux admins rely on a centralized remote monitoring system (e.g., Nagios or Cacti) to check the health of their network infrastructure. While centralized monitoring makes an admin’s life easy when dealing with many hosts and devices, a dedicated monitoring box obviously becomes a single point of failure; if the monitoring box goes down or […]
Continue reading…

 

How to perform BGP traffic engineering using Quagga on Linux

The previous tutorials demonstrated how we can turn a CentOS box into a BGP router and filter BGP prefixes using Quagga. Now that we understand basic BGP configuration, we will examine in this tutorial how to perform more advanced traffic engineering on Quagga. More specifically, we will show how we can influence the routing path […]
Continue reading…