HowtoForge - Linux Howtos and Tutorials - CentOS

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

Thu, 18 Mar 2010 11:53:34 +0100

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

Wed, 17 Mar 2010 17:21:06 +0100

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

Tue, 16 Mar 2010 17:45:03 +0100

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

Tue, 16 Mar 2010 15:29:04 +0100

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

Thu, 11 Mar 2010 12:25:49 +0100

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

Wed, 10 Mar 2010 17:12:35 +0100

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

Tue, 16 Feb 2010 17:13:08 +0100

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.

Efficient High-Available LoadBalanced Cluster On CentOS 5.3 (Direct Routing Method)

Mon, 15 Feb 2010 17:47:57 +0100

Efficient High-Available LoadBalanced Cluster On CentOS 5.3 (Direct Routing Method)

This article explains how to set up an LVS cluster of load balanced virtual servers with Heartbeat and Ldirectord On CentOS 5.3.The load balancer sits between the user and two (or more) backend Apache/IIS web servers that hold the same content. Not only does the load balancer distribute the requests to the two backend Apache/IIS servers, it also checks the health of the backend servers. If one of them is down, all requests will automatically be redirected to the remaining backend server.

How To Configure ISA Proxy/Auth Setting For Yum

Tue, 02 Feb 2010 11:40:00 +0100

How To Configure ISA Proxy/Auth Setting For Yum

I was running CentOS in my LAN for my personal use and there are MS ISA servers for proxying and each user has to use his/her user name & password for Internet. So when I used my credentials in my web browser I had no problem but when I was going to do yum no success. After some googling I found this solution.

Installing Lighttpd With PHP5 And MySQL Support On CentOS 5.4

Fri, 22 Jan 2010 16:17:47 +0100

Installing Lighttpd With PHP5 And MySQL Support On CentOS 5.4

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on a CentOS 5.4 server with PHP5 support (through FastCGI) and MySQL support.

Installing Lighttpd With PHP5 And MySQL Support On CentOS 5.3

Thu, 07 Jan 2010 13:12:55 +0100

Installing Lighttpd With PHP5 And MySQL Support On CentOS 5.3

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on a CentOS 5.3 server with PHP5 support (through FastCGI) and MySQL support.

How To Build A Low Cost SAN

Tue, 22 Dec 2009 11:46:45 +0100

How To Build A Low Cost SAN

In today's world there is a obvious need of information sharing in every department and network storage can help us to achieve this most growing challenge. Here in this article we are focusing our concentration to make a low-cost SAN.

Paravirtualization With Xen On CentOS 5.4 (x86_64)

Sun, 13 Dec 2009 17:44:39 +0100

Paravirtualization With Xen On CentOS 5.4 (x86_64)

This tutorial provides step-by-step instructions on how to install Xen (version 3.0.3) on a CentOS 5.4 (x86_64) system. Xen lets you create guest operating systems (*nix operating systems like Linux and FreeBSD), so called "virtual machines" or domUs, under a host operating system (dom0). Using Xen you can separate your applications into different virtual machines that are totally independent from each other (e.g. a virtual machine for a mail server, a virtual machine for a high-traffic web site, another virtual machine that serves your customers' web sites, a virtual machine for DNS, etc.), but still use the same hardware. This saves money, and what is even more important, it's more secure. If the virtual machine of your DNS server gets hacked, it has no effect on your other virtual machines. Plus, you can move virtual machines from one Xen server to the next one.

Expanding A Root-FS

Fri, 27 Nov 2009 17:20:08 +0100

Expanding A Root-FS

There might be the situation, that your root filesystem runs out of space, so it has to be expanded. With filesystems other than the root filesystem this could easily be done for instance with gparted. With the root filesystem this is not possible, as gparted could only expand filesystems that are not mounted, which is impossible with the root filesystem. The only way to enlarge the root filesystem is to boot from a kind of rescuesystem, Live-CD or the like, and then to expand the root filesystem. The following tutorial describes, how this is achieved by using Systemrescue-CD.

Low Cost SAN

Fri, 20 Nov 2009 17:22:09 +0100

Low Cost SAN

The objective of this document is to provide making of Low Cost SAN using FOSS tools.