CentOS

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VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless CentOS 5.4 Server

VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless CentOS 5.4 Server

This guide explains how you can run virtual machines with Sun VirtualBox 3.1.x on a headless CentOS 5.4 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

Installing PowerDNS With MySQL On CentOS

Installing PowerDNS With MySQL On CentOS

PowerDNS is a MySQL-based DNS server, written in C++ and licensed under the GPL. PowerDNS can be managed through a web interface (PowerAdmin). This guide shows how to install it on CentOS.

Distributed Replicated Storage Across Four Storage Nodes With GlusterFS On CentOS 5.4

Distributed Replicated Storage Across Four Storage Nodes With GlusterFS On CentOS 5.4

This tutorial shows how to combine four single storage servers (running CentOS 5.4) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replication1) as well as 3 and 4 (replication2) will mirror each other, and replication1 and replication2 will be combined to one larger storage server (distribution). Basically, this is RAID10 over network. If you lose one server from replication1 and one from replication2, the distributed volume continues to work. The client system (CentOS 5.4 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

Installation Of BIND As A Secondary (Slave) DNS Server On CentOS

Installation Of BIND As A Secondary (Slave) DNS Server On CentOS

After we have installed BIND as a master DNS server (NS1), we can now try to set up a secondary DNS server (NS2) with BIND on CentOS. NS2 acts as a backup if there are problems with NS1.

High-Availability Storage With GlusterFS On CentOS 5.4 - Automatic File Replication (Mirror) Across Two Storage Servers

High-Availability Storage With GlusterFS On CentOS 5.4 - Automatic File Replication (Mirror) Across Two Storage Servers

This tutorial shows how to set up a high-availability storage with two storage servers (CentOS 5.4) that use GlusterFS. Each storage server will be a mirror of the other storage server, and files will be replicated automatically across both storage servers. The client system (CentOS 5.4 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

Creating An NFS-Like Standalone Storage Server With GlusterFS On CentOS 5.4

Creating An NFS-Like Standalone Storage Server With GlusterFS On CentOS 5.4

This tutorial shows how to set up a standalone storage server on CentOS 5.4. Instead of NFS, I will use GlusterFS here. The client system will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

BIND Installation On CentOS

BIND Installation On CentOS

BIND is alternative software for translating domain names into IP addresses. Because domain names are alphabetic, they are easier to remember. So if we will browse the Internet we don’t need to remember IP addresses. For example, the domain name www.yourdomain.com might translate to 192.168.0.1.

Installation Of ZendOptimizer And IonCubeLoader Using Lighttpd On CentOS

Installation Of ZendOptimizer And IonCubeLoader Using Lighttpd On CentOS

This tutorial explains how to enable ZendOptimizer and IonCubeLoader in PHP on a Lighttpd web server on CentOS.

How To Harden PHP5 With Suhosin On CentOS 5.4

How To Harden PHP5 With Suhosin On CentOS 5.4

This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.4 server. From the Suhosin project page: "Suhosin is an advanced protection system for PHP installations that was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core. Suhosin comes in two independent parts, that can be used separately or in combination. The first part is a small patch against the PHP core, that implements a few low-level protections against bufferoverflows or format string vulnerabilities and the second part is a powerful PHP extension that implements all the other protections."

How To Set Up MySQL Database Replication With SSL Encryption On CentOS 5.4

How To Set Up MySQL Database Replication With SSL Encryption On CentOS 5.4

This tutorial describes how to set up database replication in MySQL using an SSL connection for encryption (to make it impossible for hackers to sniff out passwords and data transferred between the master and slave). MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures though.

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