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Ubuntu

Installing KVM Guests With virt-install On Ubuntu 11.04 Server

Post date: May 10, 2011, 11:05 Category: Miscellaneous Views: 3358 Comments
Tutorial quote: Unlike virt-manager, virt-install is a command line tool that allows you to create KVM guests on a headless server. You may ask yourself: "But I can use vmbuilder to do this, why do I need virt-install?" The difference between virt-install and vmbuilder is that vmbuilder is for creating Ubuntu-based guests, whereas virt-install lets you install all kinds of operating systems (e.g. Linux, Windows, Solaris, FreeBSD, OpenBSD) and distributions in a guest, just like virt-manager. This article shows how you can use it on an Ubuntu 11.04 KVM server.
Debian

How to filter spam with Spamassassin and Postfix in Debian

Post date: April 20, 2008, 18:04 Category: Network Views: 4203 Comments
Tutorial quote: 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.

Debian

Running A File-, Print-, Proxy-, DHCP-, AND Time-Server For Small/Medium Enterprises

Post date: October 18, 2006, 18:10 Category: System Views: 4725 Comments
Tutorial quote: This article shows how to run a file-, print-, HTTP proxy- DHCP-, and time server for small and medium enterprises (SME) on one single Debian Sarge system. It is very easy to set up, and management is done with an easy-to-use web interface called eBox so once the system is set up, you can forget about the command line. eBox was developed to administrate advanced services for corporate networks, and it was created for Debian Sarge.
Unix+clones

How To Look Like A UNIX Guru

Post date: October 30, 2006, 02:10 Category: Miscellaneous Views: 6449 Comments
Tutorial quote: UNIX is an extremely popular platform for deploying server software partly because of its security and stability, but also because it has a rich set of command line and scripting tools. Programmers use these tools for manipulating the file system, processing log files, and generally automating as much as possible.

If you want to be a serious server developer, you will need to have a certain facility with a number of UNIX tools; about 15. You will start to see similarities among them, particularly regular expressions, and soon you will feel very comfortable. Combining the simple commands, you can build very powerful tools very quickly--much faster than you could build the equivalent functionality in C or Java, for example.

This lecture takes you through the basic commands and then shows you how to combine them in simple patterns or idioms to provide sophisticated functionality like histogramming. This lecture assumes you know what a shell is and that you have some basic familiarity with UNIX.
Unix+clones

Sudo FAQ

Post date: February 26, 2007, 21:02 Category: Security Views: 5046 Comments
Tutorial quote: Sudo is a simple program which allows the administrator to give regular users extra permissions to execute the commands they would normally not be allowed to use. Thanks to sudo, we can execute commands that are usually restricted to the root account. In practice, it looks like that: instead of typing su ->password -> command you type sudo command. In order to use sudo you need to configure it properly. This FAQ is supposed to help you with this task.
Ubuntu

Android App Build Environment Setup With Eclipse, PhoneGap (Ubuntu 11.04)

Post date: June 28, 2011, 11:06 Category: Installing Views: 3263 Comments
Tutorial quote: This tutorial describes how you can set up an development environment for building Android apps on an Ubuntu 11.04 desktop using Eclipse, the Android SDK, and PhoneGap. I will describe how to build Android apps from the command line with PhoneGap and from the GUI with Eclipse and PhoneGap and how to test them in an Android emulator and on a real Android device. PhoneGap allows you to develop your Android applications using web technologies such as HTML, CSS, and JavaScript (e.g. with JavaScript libraries such as jQuery/jQTouch), and it will turn these web apps into native Android apps (in fact, PhoneGap supports multiple platforms such as Android, iPhone, Palm, Windows Mobile, Symbian, so you can use the same sources to create apps for multiple platforms).
Unix+clones

Python Programming for Beginners

Post date: September 19, 2006, 09:09 Category: Programming Views: 45804 Comments
Tutorial quote: Despite what assembly code and C coders might tell us, high-level languages do have their place in every programmer's toolbox, and some of them are much more than a computer-science curiosity. Out of the many high-level languages we can choose from today, Python seems to be the most interesting for those who want to learn something new and do real work at the same time. Its no-nonsense implementation of object-oriented programming and its clean and easy-to-understand syntax make it a language that is fun to learn and use, which is not something we can say about most other languages.

In this tutorial, you will learn how to write applications that use command-line options, read and write to pipes, access environment variables, handle interrupts, read from and write to files, create temporary files and write to system logs. In other words, you will find recipes for writing real applications instead of the old boring Hello, World! stuff.
Linux

shred - Securely delete files in Linux

Post date: January 24, 2010, 06:01 Category: Security Views: 5243 Comments
Tutorial quote: In case you want to delete some confidential data from your computer just to make sure that it is no longer accessible to anyone, then do not delete the file using the regular rm command because there will still remain a chance that someone might use a software to recover your deleted data before the specific storage area is overwritten by new data. The proper way to permanently dispose of such data in Linux is the shred command.
Fedora

Android App Build Environment With Eclipse, Android SDK, PhoneGap (Fedora 14)

Post date: February 1, 2011, 13:02 Category: Installing Views: 2862 Comments
Tutorial quote: This tutorial describes how you can set up a development environment for building Android apps on a Fedora 14 desktop using Eclipse, the Android SDK, and PhoneGap. I will describe how to build Android apps from the command line with PhoneGap and from the GUI with Eclipse and PhoneGap and how to test them in an Android emulator and on a real Android device. PhoneGap allows you to develop your Android applications using web technologies such as HTML, CSS, and JavaScript (e.g. with JavaScript libraries such as jQuery/jQTouch), and it will turn these web apps into native Android apps (in fact, PhoneGap supports multiple platforms such as Android, iPhone, Palm, Windows Mobile, Symbian, so you can use the same sources to create apps for multiple platforms).
Unix+clones

How to Kill a Process

Post date: November 11, 2007, 05:11 Category: System Views: 3921 Comments
Tutorial quote: Ever working in KDE or Gnome, your application freezes and even the close button doesn’t work? Then it is time to pull out the “kill” command. We can use a combination of the grep and ps command to find our process and when we find the PID number we can effectively kill the process without having to restart KDE or Gnome.
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