david23 blogja

How to filter spam with Spamassassin and Postfix in Debian

We have already discussed how to install mail server with postfix+Devcot+SASL +Squirrel Mail in this article we will see how to add spam filter for postfix mail server.Apache SpamAssassin is an extensible email filter that is used to identify spam. Once identified, the mail can then be optionally tagged as spam for later filtering. It provides a command line tool to perform filtering, a client-server system to filter large volumes of mail, and Mail::SpamAssassin, a set of Perl modules allowing Apache SpamAssassin to be used in a wide variety of email systems.

Full Story

Database Server With postgresql and pgadmin3 in Ubuntu

PostgreSQL is a powerful, open source relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD,HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows. It is fully ACID compliant, has full support for foreign keys, joins, views, triggers, and stored procedures (in multiple languages). It includes most SQL92 and SQL99 data types, including INTEGER, NUMERIC, BOOLEAN, CHAR, VARCHAR, DATE, INTERVAL, and TIMESTAMP. It also supports storage of binary large objects, including pictures, sounds, or video. It has native programming interfaces for C/C++, Java, .Net, Perl, Python, Ruby, Tcl, ODBC, among others.

Tools to access Linux Partitions from Windows

If you dual boot with Windows and Linux, and have data spread across different partitions on Linux and Windows, you should be really in for some issues.

It happens sometimes you need to access your files on Linux partitions from Windows, and you realize it isn’t possible easily. Not really, with these tools in hand - it’s very easy for you to access files on your Linux partitions from Windows.

Full Story

Linux Directory Structure Overview

One of the most noticeable differences between Linux and Windows is the directory structure. Not only is the format different, but the logic of where to find things is different.This tutorial will explain about Linux Directory Structure Overview with graphical image.

Full Story

Debian Mail Server Setup with Postfix + Dovecot + SASL + Squirrel Mail

Postfix is an attempt to provide an alternative to the widely-used Sendmail program. Postfix attempts to be fast, easy to administer,and hopefully secure, while at the same time being sendmail compatible enough to not upset your users.This tutorial will explain how to setup mail server with Postfix + Dovecot + SASL + Squirrel Mail.

Full Story

Howto create a Transparent Terminal in Ubuntu Desktop

This tutorial will explain how to create a Transparent Terminal in Gnome Background using alltray.With AllTray you can dock any application with no native tray icon (like Evolution, Thunderbird, Terminals) into the system tray. A high-light feature is that a click on the “close” button will minimize back to system tray. It works well with Gnome, KDE, XFCE 4*, Fluxbox* and WindowMaker*. (*) No drag ‘n drop support. Enable with “-nm” option

Full Story

GLPI - IT and asset Managemet Software Setup in Ubuntu

GLPI stands for “Gestionnaire libre de parc informatique”, GLPI is the Information Resource Manager with an additional Administration- Interface. You can use it to build up a database with an inventory for your company (computer, software, printers…). It has enhanced functions to make the daily life for the administrators easier, like a job tracking system with mail-notification and methods to build a database with basic information about your network-topology.

Full Story

FTP Server setup with TLS (Transport Layer Security) on Debian

ProFTPD is a ftp server written for use on Unix and Unix-a-like operating systems, there is no support for native use under Microsoft Windows.This tutorial will explain how to setup proftp server with TLS in debian etch.The TLS protocol allows applications to communicate across a network in a way designed to prevent eavesdropping, tampering, and message forgery. TLS provides endpoint authentication and communications privacy over the Internet using cryptography.

Full Story

KDE 4.0 Screenshots Tour

KDE 4.0 is the innovative Free Software desktop containing lots of applications for every day use as well as for specific purposes.Plasma is a new desktop shell developed for KDE 4, providing an intuitive interface to interact with the desktop and applications.The Konqueror web browser integrates the web with the desktop. The Dolphin file manager, the Okular document reader and the System Settings control center complete the basic desktop set.

Full Story

Howto Install KDE 4.0 (Stable) in Ubuntu Gutsy

KDE 4.0 is the innovative Free Software desktop containing lots of applications for every day use as well as for specific purposes.Plasma is a new desktop shell developed for KDE 4, providing an intuitive interface to interact with the desktop and applications.The Konqueror web browser integrates the web with the desktop. The Dolphin file manager, the Okular document reader and the System Settings control center complete the basic desktop set.

Full Story

Saving Power on Intel Hardware Using Powertop

PowerTOP is a Linux tool that finds the software component(s) that make your laptop use more power than necessary while it is idle. As of Linux kernel version 2.6.21, the kernel no longer has a fixed 1000Hz timer tick. This will (in theory) give a huge power savings because the CPU stays in low power mode for longer periods of time during system idle.

Full Story

ssh on multiple servers Using cluster ssh

Cluster SSH opens terminal windows with connections to specified hosts and an administration console. Any text typed into the administration console is replicated to all other connected and active windows. This tool is intended for, but not limited to, cluster administration where the same configuration or commands must be run on each node within the cluster.Performing these commands all at once via this tool ensures all nodes are kept in sync.

Full Story

IPBlock - Graphical IP Blocker

iplist allows users with no or basic knowledge of iptables to filter (e.g. to block) network traffic based on (automatically updated) lists. These lists have various formats and are sorted by different categories (e.g. countries,adware, corporations).

Full Story

How to setup Apache Tomcat 5.5 on Debian Etch

Apache Tomcat is a web container, or application server developed at the Apache Software Foundation (ASF). Tomcat implements the servlet and the JavaServer Pages (JSP) specifications from Sun Microsystems, providing an environment for Java code to run in cooperation with a web server. It adds tools for configuration and management but can also be configured by editing configuration files that are normally XML-formatted. Tomcat includes its own internal HTTP server.

Full Story

FreeNX Server and Client Installation in Debian Etch

FreeNX is a system that allows you to access your desktop from another machine over the internet. You can use this to login graphically to your desktop from a remote location. One example of its use would be to have a FreeNX server set up on your home computer, and graphically logging in to the home computer from your work computer, using a FreeNX client.

Full Story

Working with vast raster images: NIP2

nip2 is a graphical front end to the VIPS package.VIPS is an image processing system designed with
efficiency in mind. It is good with large images (images larger than the amount of RAM in your machine),and for working with colour. It can perform many image manipulation tasks much faster than other packages such as ImageMagick and the GIMP and includes some special features such as creating single "mosaic" images from multiple parts.

Full Story