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Debian RAID 1/5 system installer

Post date: May 28, 2005, 22:05 Category: Installing Views: 3103 Comments
Tutorial quote: Instructions for installing a very clean Debian GNU/Linux system that boots from RAID 1, and has RAID 1 or RAID 5 root and data filesystems.

The examples assume two identical harddrives, sda and sdb, on which after a small boot partition, 1 GB is used for swap, 25 GB is used for the root filesystem and everything else is for a big "data" partition that will hold non-system stuff.

TrueCrypt Tutorial: Truly Portable Data Encryption

Post date: July 2, 2007, 23:07 Category: Security Views: 3505 Comments
Tutorial quote: TrueCrypt is a free software that encrypts data on-the-fly. Right now the newest version released is version 4.3. You can create an encrypted hard drive, a separate partition or a directory with TrueCrypt. It does not simply encrypt the content of files, but their names and the names of the directories they are in as well. Moreover there is no way to check the size of the encrypted directory/HDD/partition. TrueCrypt is available for Windows and Linux.

pv (Pipe Viewer) - Shell pipeline element to meter data passing through

Post date: December 28, 2008, 22:12 Category: System Views: 3056 Comments
Tutorial quote: pv (Pipe Viewer) can be inserted into any normal pipeline between two processes to give a visual indication of how quickly data is passing through, how long it has taken, how near to completion it is, and an estimate of how long it will be until completion.To use it, insert it in a pipeline between two processes, with the appropriate options.


ZABBIX monitoring System installation with screenshots

Post date: August 17, 2006, 16:08 Category: Network Views: 4158 Comments
Tutorial quote: ZABBIX is a 24×7 monitoring solution without high cost.

ZABBIX is software that monitors numerous parameters of a network and the health and integrity of servers. ZABBIX uses a flexible notification mechanism that allows users to configure e-mail based alerts for virtually any event. This allows a fast reaction to server problems. ZABBIX offers excellent reporting and data visualisation features based on the stored data. This makes ZABBIX ideal for capacity planning.

How To Install And Use MyDLP

Post date: March 21, 2011, 13:03 Category: Installing Views: 3624 Comments
Tutorial quote: This document can be used as a guide to installation of MyDLP Appliance. It also describes the basic usage. MyDLP is an easy, simple and open DLP (data loss prevention) solution, licensed under GPLv3. MyDLP 1.0 was released on 10 November 2010. MyDLP Appliance is a distribution based on Ubuntu Server. The distribution comes as a easy to deploy key solution. Protecting customer records, securing confidential files, data flow enforcements... this is all achievable within 30 minutes.

Setting Up A Highly Available NFS Server

Post date: April 1, 2006, 05:04 Category: Network Views: 6284 Comments
Tutorial quote: In this tutorial I will describe how to set up a highly available NFS server that can be used as storage solution for other high-availability services like, for example, a cluster of web servers that are being loadbalanced. If you have a web server cluster with two or more nodes that serve the same web site(s), than these nodes must access the same pool of data so that every node serves the same data, no matter if the loadbalancer directs the user to node 1 or node n. This can be achieved with an NFS share on an NFS server that all web server nodes (the NFS clients) can access.

As we do not want the NFS server to become another "Single Point of Failure", we have to make it highly available. In fact, in this tutorial I will create two NFS servers that mirror their data to each other in realtime using DRBD and that monitor each other using heartbeat, and if one NFS server fails, the other takes over silently. To the outside (e.g. the web server nodes) these two NFS servers will appear as a single NFS server.

In this setup I will use Debian Sarge (3.1) for the two NFS servers as well as for the NFS client (which represents a node of the web server cluster).

How to Obtain the Dell/HP Server (May be other vendors) service tag in Debian

Post date: October 26, 2008, 19:10 Category: System Views: 2912 Comments
Tutorial quote: You are using debian on Dell or HP servers if you want to know the serialnumber and model you can use the following procedure.This is verr useful when you are connected remotely and find the details.

Dump Desktop Management Interface data.The Desktop Management Interface provides a standardized description of
a computer’s hardware, including characteristics such as BIOS serial number and hardware connectors. dmidecode provides a dump of the DMI data available from the BIOS. It is used as a back-end tool by other hardware detection programs.

Restoring a Sun system using JumpStart technology

Post date: April 13, 2005, 05:04 Category: Installing Views: 3968 Comments
Tutorial quote: If a server crash and the file systems are corrupted or totally destroyed, then the only way to recover the data is to restore from backups. If it is only user data that is corrupted, the task is in general simple, but if the system disk fails, then there is a little bit more work involved in order to to recover the system. This article explains how to backup Sun systems using ufsrestore over NFS, and how to use Sun's JumpStart technology to restore Sun servers and workstations over the network.

Setting Up A Subversion Repository Using Apache, With Auto Updatable Working Copy

Post date: June 19, 2007, 02:06 Category: Miscellaneous Views: 3070 Comments
Tutorial quote: Subversion is a free/open-source version control system. That is, Subversion manages files and directories over time. A tree of files is placed into a central repository. The repository is much like an ordinary file server, except that it remembers every change ever made to your files and directories. This allows you to recover older versions of your data, or examine the history of how your data changed. In this regard, many people think of a version control system as a sort of time machine.

Storing Files/Directories In Memory With tmpfs

Post date: December 9, 2008, 12:12 Category: Miscellaneous Views: 2927 Comments
Tutorial quote: You probably know that reading from RAM is a lot of faster than reading files from the hard drive, and reduces your disk I/O. This article shows how you can store files and directories in memory instead of on the hard drive with the help of tmpfs (a file system for creating memory devices). This is ideal for file caches and other temporary data (such as PHP's session files if you are using session.save_handler = files) because the data is lost when you power down or reboot the system.
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