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Ubuntu

High-Availability Storage With GlusterFS On Ubuntu 9.10

Post date: January 10, 2010, 15:01 Category: Installing Views: 3758 Comments
Tutorial quote: This tutorial shows how to set up a high-availability storage with two storage servers (Ubuntu 9.10) 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 (Ubuntu 9.10 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.
Debian

Securing Debian Manual

Post date: January 1, 2008, 13:01 Category: Security Views: 4457 Comments
Tutorial quote: This document describes security in the Debian project and in the Debian operating system. Starting with the process of securing and hardening the default Debian GNU/Linux distribution installation, it also covers some of the common tasks to set up a secure network environment using Debian GNU/Linux, gives additional information on the security tools available and talks about how security is enforced in Debian by the security and audit team.
Mandriva

The Perfect Desktop - Mandriva One 2010.1 Spring With GNOME

Post date: July 20, 2010, 11:07 Category: Desktop Views: 5694 Comments
Tutorial quote: This tutorial shows how you can set up a Mandriva One 2010.1 Spring desktop (with the GNOME desktop environment) that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge.
Linux

How To Set Up An IRC Server And Anope IRC Services

Post date: February 1, 2007, 19:02 Category: Installing Views: 4414 Comments
Tutorial quote: This tutorial describes how to set up and run an UnrealIRCD server on OpenSuSE 10.2 and Fedora Core 6. It also shows how to install Anope IRC services. Anope is a set of Services for IRC networks that allows users to manage their nicks and channels in a secure and efficient way, and administrators to manage their network with powerful tools.
Ubuntu

The Perfect Desktop - Kubuntu 8.04 (Hardy Heron)

Post date: May 1, 2008, 10:05 Category: Desktop Views: 4064 Comments
Tutorial quote: This tutorial shows how you can set up a Kubuntu 8.04 (Hardy Heron) desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. Kubuntu 8.04 is derived from Ubuntu 8.04 LTS and uses the KDE desktop instead of the GNOME desktop.
Linux

NFS over CIPE-VPN tunnels

Post date: May 23, 2005, 16:05 Category: Network Views: 3581 Comments
Tutorial quote: The Network File System (NFS) is a standard protocol for sharing file services with Linux and Unix computers. It is a distributed file system that enables local access to remote disks and file systems and is based on the client\server architecture. Although easy to configure, it is typically used only to transfer data over an intranet or LAN because of its transparency and security potholes when exposed to the risks of the Internet. However, it still can be employed -- without compromising security -- to share files over the Internet by configuring it to run on a Virtual Private Network (VPN) connection. This article will show you how to set up NFS to run over a CIPE-VPN connection between two Linux systems.
CentOS

Virtual Users With Postfix, PostfixAdmin, Courier, Mailscanner, ClamAV On CentOS

Post date: February 4, 2007, 20:02 Category: Installing Views: 6978 Comments
Tutorial quote: This article shows how to set up a Postfix virtual mailserver with Courier-IMAP, Maildrop and the PostfixAdmin web interface. We will secure our mailserver with Mailscanner and ClamAV as anti-virus and SpamAssassin as anti-spam. The setup is based on CentOS 4.4.
Linux

Creating a safe directory with PAM and Encfs

Post date: June 7, 2006, 20:06 Category: Security Views: 4181 Comments
Tutorial quote: Now, in my network (and others) the credentials provided at login could (and should) be used by those programs. How can you retrieve these credentials, providing enough security?
With a the PAM modules pam_script it's possible to store the password in a file, which will be used by fusemb and mount.cifs to read the password from.

To achieve security, one could make the user logging in owner and deny read/write for anybody else. Remove this file when the user ends his/her session.
This is enough, for runtime. But I was wondering, but what if the system crashes, and the file with the credentials remains on the harddrive? Anybody who is able to mount this harddrive with for example a lifecd, can read this file!

That's why I was looking for a way to encrypt this file.

With encfs this is very possible! At run time it gives an interface to encrypted files and directories, which does only exist at runtime! When the system is not running, there are only encrypted files, useless when you do not know the key to it. And this key is exactly the (encrypted) password! That's why I've chosen for a combination of PAM and Encfs.
Debian

Xen from Backports on Debian Sarge

Post date: August 12, 2006, 18:08 Category: Software Views: 3438 Comments
Tutorial quote: There is a great howto about installing Xen on Debian Unstable. It is really easy to do and it runs fine. Nevertheless, on production servers, that's not an optimal solution. Debian Unstable has too many updates and things change too often. On production machines, a Xen host system should be stable, secure and should not need much attention. That is where Sarge comes in. If you pull the Xen packages from backports and install them on Debian stable you've got the best of both worlds. Let's do so!
gOS

The Perfect Desktop - gOS 3.1 Gadgets

Post date: August 13, 2009, 11:08 Category: Desktop Views: 5730 Comments
Tutorial quote: This tutorial shows how you can set up a gOS 3.1 Gadgets desktop that is a full-fledged replacement for a Windows desktop, i.e. that has all the software that people need to do the things they do on their Windows desktops. The advantages are clear: you get a secure system without DRM restrictions that works even on old hardware, and the best thing is: all software comes free of charge. gOS is a lightweight Linux distribution, based on Ubuntu 8.04, that comes with Google Apps and some other Web 2.0 applications; gOS 3.1 Gadgets uses the GNOME desktop.
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