HowtoForge - Linux Howtos and Tutorials - CentOS

Chrooting Apache2 With mod_chroot On CentOS 5.4

Wed, 21 Jul 2010 17:52:58 +0200

Chrooting Apache2 With mod_chroot On CentOS 5.4

This guide explains how to set up mod_chroot with Apache2 on a CentOS 5.4 system. With mod_chroot, you can run Apache2 in a secure chroot environment and make your server less vulnerable to break-in attempts that try to exploit vulnerabilities in Apache2 or your installed web applications.

Flexnet License Monitoring With rrdtool

Tue, 13 Jul 2010 18:05:05 +0200

Flexnet License Monitoring With rrdtool

Some of you may know the commercial Flexnet Licencing Application (©Macrovision). It's a client-server based solution for managing the usage of socalled Flexnet-enabled applications. You can hold licenses of more than one product on one license-server. As you typically have to buy licenses and licenses can be expensive it would be nice to have a monitoring solution, to see the utilization of the precious licenses, wether they are underutilized (so money is wasted) or are always fully utilized (so that you can suspect that sometimes people can not do their work, or only delayed) which is also a waste of resources. As far as I know there are commercial applications for performing such reports, but again you have to spent money. Why not build a simple system yourself, which shows the actual and past usage in an "MRTG style"?

iRedOS-0.6.0: Open Source Mail Server With Postfix, Dovecot, Amavisd, ClamAV, SpamAssassin, RoundCube

Wed, 07 Jul 2010 17:36:49 +0200

iRedOS-0.6.0: Open Source Mail Server With Postfix, Dovecot, Amavisd, ClamAV, SpamAssassin, RoundCube

iRedMail is a shell script that lets you quickly deploy a Open Source Mail Server solution in less than 2 minutes. iRedOS is a customized CentOS 5.5 distribution, where e unnecessary packages were removed. It ships with the lastest version of iRedMail (iredmail0.6.0); it lets you install iredmail more quickly and smooth.

How To Integrate ClamAV Into PureFTPd For Virus Scanning On CentOS 5.4

Wed, 16 Jun 2010 17:29:27 +0200

How To Integrate ClamAV Into PureFTPd For Virus Scanning On CentOS 5.4

This tutorial explains how you can integrate ClamAV into PureFTPd for virus scanning on a CentOS 5.4 system. In the end, whenever a file gets uploaded through PureFTPd, ClamAV will check the file and delete it if it is malware.

The Perfect Server - CentOS 5.5 x86_64 [ISPConfig 3]

Thu, 27 May 2010 16:47:06 +0200

The Perfect Server - CentOS 5.5 x86_64 [ISPConfig 3]

This tutorial shows how to prepare a CentOS 5.5 x86_64 server for the installation of ISPConfig 3, and how to install ISPConfig 3. ISPConfig 3 is a webhosting control panel that allows you to configure the following services through a web browser: Apache web server, Postfix mail server, MySQL, MyDNS nameserver, PureFTPd, SpamAssassin, ClamAV, and many more.

The Perfect Server - CentOS 5.5 x86_64 [ISPConfig 2]

Tue, 25 May 2010 18:17:33 +0200

The Perfect Server - CentOS 5.5 x86_64 [ISPConfig 2]

This tutorial shows how to set up a CentOS 5.5 server (x86_64) that offers all services needed by ISPs and web hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 64-bit version of CentOS 5.5, but should apply to the 32-bit version with very little modifications as well. In the end you should have a system that works reliably, and if you like you can install the free webhosting control panel ISPConfig (i.e., ISPConfig runs on it out of the box).

Sphinx As MySQL Storage Engine (SphinxSE)

Wed, 19 May 2010 17:22:58 +0200

Sphinx As MySQL Storage Engine (SphinxSE)

SphinX is a great full-text search engine for MySQL. Installing the Sphinx daemon was straightforward as you can compile it from the source or use a .DEB/.RPM package but SphinxSE was a little bit tricky since it needed to be installed as a plugin on a running MySQL server. So if you use Debian or Centos and install your MySQL from a .deb or .rpm package this is how you do it.

Using iRedMail And OpenVPN For Virtual Email Hosting And VPN Services (CentOS 5.4)

Wed, 14 Apr 2010 17:59:08 +0200

Using iRedMail And OpenVPN For Virtual Email Hosting And VPN Services, With Central Authentication Against OpenLDAP (CentOS 5.4)

iRedMail is a shell script that lets you quickly deploy a full-featured mail solution in less than 2 minutes. iRedMail supports both OpenLDAP and MySQL as backends for storing virtual domains and users. This tutorial shows you how to integrate OpenVPN into iredmail's ldap backend on CentOS 5.x, passwords will be stored in ldap and you can change the password though webmail.

Striping Across Four Storage Nodes With GlusterFS On CentOS 5.4

Tue, 06 Apr 2010 17:28:23 +0200

Striping Across Four Storage Nodes With GlusterFS On CentOS 5.4

This tutorial shows how to do data striping (segmentation of logically sequential data, such as a single file, so that segments can be assigned to multiple physical devices in a round-robin fashion and thus written concurrently) across four single storage servers (running CentOS 5.4) with GlusterFS. 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.

Installing Nictool On CentOS 5

Thu, 01 Apr 2010 12:56:40 +0200

Installing Nictool On CentOS 5

Nictool is a free software for managing DNS, but for download we have to register at www.nictool.com; Nictool can export from djbdns, BIND, PowerDNS. All data is stored in MySQL and can be managed over the web using a browser. This tutorial shows how to install Nictool on CentOS 5.2.

Distributed Storage Across Four Storage Nodes With GlusterFS On CentOS 5.4

Tue, 30 Mar 2010 17:29:10 +0200

Distributed 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 one large storage server (distributed storage) with GlusterFS. 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.

Installing Lighttpd With PHP5 And MySQL On CentOS 5.2

Tue, 30 Mar 2010 12:32:11 +0200

Installing Lighttpd With PHP5 And MySQL On CentOS 5.2

Lighttpd is a webserver designed to be secure, fast, standards-compliant, and flexible while being optimized for speed-critical environments. This post shows how to install it with PHP5 and MySQL support on Centos 5.2.

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

Thu, 25 Mar 2010 18:05:47 +0100

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

Tue, 23 Mar 2010 11:07:49 +0100

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

Sun, 21 Mar 2010 20:24:29 +0100

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.