Tutorial Proggraming Free

tutorial - DNS protocol monitoring and spoofing program

Zodiac is a DNS protocol analyzation and exploitation program. It is a robust tool to explore the DNS protocol. Internally it contains advanced DNS routines for DNS packet construction and disassembling and is the optimal tool if you just want to try something out without undergoing the hassle to rewrite DNS packet routines or packet filtering.

Zodiac has been developed and tested on the Linux 2.2.x platform. It should work on all platforms that do have POSIX Threads, the terminal library ncurses and the libpcap packet capture library installed. To run zodiac you need root access for obvious reasons

Features

sniffing on all kinds of configured devices (Ethernet, PPP, …)
capturing and decoding nearly all types of DNS packets, including packet decompression
ncurses driven text based frontend with interactive commandline and multiple windows
threaded design allow more flexibility when adding your own features
clean code, commented and tested just fine, ready for you to extend
internal DNS packet filtering allows installation of pseudo DNS filters you can “select()” on a large set of DNS packet construction primitives
DNS name server versioning using BIND version requests
DNS local spoofing, answering DNS queries on your LAN before the remote NS
DNS jizz spoofing, exploiting a weakness within old BIND versions
DNS ID spoofing, exploiting a weakness within the DNS protocol itself

Download: zodiac-0.4.9.tar.gz

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source:http://linuxpoison.blogspot.com/2008/07/1357817580288.html

tutorial - Bandwidth Shaping using wondershaper

Traffic shaping on Linux system used to require knowledge of lot of things like iptables, qdiscs & networking protocols. Things have changed and now there are couple of tools which handle all of this complexity without requiring much knowledge. And one of them is wondershaper.

First install wondershper before using any of the command mentioned below also, you need to be root.

1) Use ifconfig to determine which of your networkcards is connected to internet.

# ifconfig

2) Time to shape the bandwidth--

# wondershaper

Where interface name is your network interface name like eth0 or eth1 or wifi0 and down speed , up speed are specified in kilo bits per second.

So sample command will look like

# wondershaper eth0 128 64

3) To disable wondershaper from controlling particular interface use following command.

# wondershaper clear eth0

4) To make these changes permanent add following lines to network file

up /sbin/wondershaper
down /sbin/wondershaper clear

source:http://linuxpoison.blogspot.com/2008/07/13578175803690.html

tutorial - Copying Files between Linux and Windows Computers with SSH

To transfer files from Linux to Windows using SSH, choose one of the following applications:

PuTTY

PuTTY is a suite of different command line tools for working with an SSH daemon. Download it from http://www.chiark.greenend.org.uk/~sgtatham/putty.html.

WinSCP

WinSCP is very similar to PuTTY, but includes a graphical user interface. Choose from an Explorer or Norton Commander style. Download it from http://winscp.net.

To copy a file from Windows to Linux with PuTTY, proceed as follows (on the Windows machine):

1.Start PSCP.
2.Enter the hostname of your SSH server.
3.Enter your login and password to the SSH server.

To connect from Windows to Linux with WinSCP, proceed as follows (on the Windows machine):

1.Start WinSCP.
2.Enter the hostname of the SSH server and username.
3.Click Login and acknowledge the following warning.
4.Drag and drop any files or directories from or to your WinSCP window.

source:http://linuxpoison.blogspot.com/2008/07/135781758018615.html

tutorial - BSD - True Friend of Linus Torvalds

Linus Torvalds is often famous for his outrageous statements. One of those famous statements was made yesterday, that will probably go down in history as one of the funniest quotes ever made by Linus.

You can read his comment in context with the rest of his post here.

I just want to say this in record that I have nothing against BSD, but this is one of those comments that needs to be mentioned, regardless of your feelings towards the subject.

Here are some other outrageous comments Linus has made in the past:

“My name is Linus, and I am your God.”
Linus’ law (nr 76 of 271):
“Don’t claim to have a config option, if you don’t actually have the UI
to change it” (source)
“I have an ego the size of a small planet”
“An infinite number of monkeys typing into GNU emacs would never make a good program.”
“Really, I’m not out to destroy Microsoft. That will just be a completely unintentional side effect.”

His quotes are popular enough to have their own wikiqoute section.
So what do you guys think of the new BSD logo? (fanboys can relax, it’s just a harmless phun)

Note: If anyone has any objection to the picture above, please let me know, I will remove it.

Source : http://www.linuxhaxor.net/2008/07/16/new-logo-for-bsd/

source:http://linuxpoison.blogspot.com/2008/07/13578175803144.html

tutorial - How to Force fsck (Filesystem check) on next boot

If you want to force fsck on the next boot, just create a file called /forcefsck . If this file is present, then during next boot - the fsck is forced.

# touch /forcefsck

Now reboot the machine and when it comes up, fsck will be forced.

# reboot

source:http://linuxpoison.blogspot.com/2008/07/135781758018259.html

tutorial - How To get Harware information in OpenSuse 11

Use YaST, if you want to know more about your hardware or if you need to find out details like vendor and model of a certain hardware to be able to properly configure it. Open yast2 by typing the command "yast2" (you need to be root)

1.In YaST, click Hardware+Hardware Information. Hardware probings starts immediately and it will take some time until you see the hardware information tree in a separate window. Something similar to this ...

2.In the hardware information tree recursively click on the plus icons to expand the information about a specific device.

3.Click Close to leave the hardware information overview.

source:http://linuxpoison.blogspot.com/2008/07/135781758011300.html

tutorial - UNIX System V Signals

Symbol     Number   Action       Meaning


SIGHUP     1        exit         Hangs up.
SIGINT     2        exit         Interrupts.
SIGQUIT    3        core dump    Quits.
SIGILL     4        core dump    Illegal instruction.
SIGTRAP    5        core dump    Trace trap.
SIGIOT     6        core dump    IOT instruction.
SIGEMT     7        core dump    MT instruction.
SIGFPE     8        core dump    Floating point exception.
SIGKILL    9        exit         Kills (cannot be caught or ignored).
SIGBUS     10       core dump    Bus error.
SIGSEGV    11       core dump    Segmentation violation.
SIGSYS     12       core dump    Bad argument to system call.
SIGPIPE    13       exit         Writes on a pipe with no one to read it.
SIGALRM    14       exit         Alarm clock.
SIGTERM    15       exit         Software termination signal.

source:http://linuxpoison.blogspot.com/2008/07/135781758011488.html

tutorial - Linux Filesystem Testing Tools

Filesystems:

Bonnie	Bonnie++ is test suite, which performs several hard drive/ filesystem tests.
dbench	Filesystem benchmark that generates good filesystem load
fs_inode	Part of the LTP: This test creates several subdirectories and files off of two parent directories and removes directories and files as part of the test.
fs_maim	Part of the LTP: a set of scripts to test and stress filesystem and storage management utilities
IOZone	Filesystem benchmark tool (read, write, re-read, re-write, read backwards, read strided, fread, fwrite, random read, pread, aio_read, aio_write)
lftest	Part of the LTP:lftest is a tool/test designed to create large files and lseek from the beginning of the file to the end of the file after each block write. This test verifies large file support and can be used to generate large files for other filesystem tests.	Files up to 2Tb have been created using this tool. This test is VERY picky about glibc version.
LTP	The Linux Test Project is a collection of tools for testing the Linux kernel and related features.
PostMark	Filesystem benchmark that simulates load generated by enterprise applications such as email, news and web-based commerce.
stress	puts the system under a specified amount of load
mongo	set of the programs to test linux filesystems for performance and functionality
fsx	File system exerciser from Apple.	The test is most effective if you let it run for a minute or two, so that it overlaps the periodic sync that most Unix systems do.
xdd	Storage I/O Performance Characterization tool that runs on most UNIX-like systems and Windows.	Has been around since 1992 and is in use at various government labs.

source:http://linuxpoison.blogspot.com/2008/07/13578175805109.html

tutorial - Scientific version of Ubuntu - Poseidon Linux

Poseidon Linux was designed as a friendly and complete desktop, based on open source software and aimed at the Brazilian/International scientific community. This operating system is based on Ubuntu and inspired by Quantian Linux. It offers several specific tools in the areas of GIS, 3D Visualization, Mathematics, Statistics and several otherfields of research. It also has all the software expected in a modern desktop such as an office suite - with spell checker, web browsers, e-mail readers, instant messaging, to cite but a few.

It includes a large number of scientific applications, covering areas such as:

GIS and Geostatistics

Visualization 2D/3D/4D

Mathematics

Statistics

Physics

Chemistry

CAD / Engineering

Computer Graphics

Image Editing and Vectorial Drawing

Numeric modelling / Simulation

Scientific graphs

Scientific Authoring

Database

Programming languages

Poseidon Linux 3.0 also offers all software needed to make it a complete workstation - office suite, web browser, e-mail readers, instant messaging, among others.

To download Poseidon Linux 3.0 now, please click here

source:http://linuxpoison.blogspot.com/2008/07/135781758019942.html

tutorial - How To install/upgrade KDE 4.1 on OpenSuse 11.0

On 29th July 2008, The KDE Community released KDE 4.1.0. This release is the second feature release of the KDE 4 series, sporting new applications and newly developed features on top of the Pillars of KDE4.

KDE 4.1 is the first KDE4 release to contain the Personal Information Management suite KDE-PIM with its E-Mail client KMail, the planner KOrganizer, Akregator, the RSS feed reader, KNode, the newsgroup reader and many more components integrated into the Kontact shell. Furthermore, the new desktop shell Plasma, introduced in KDE 4.0, has matured to the point where it can replace the KDE 3 shell for most casual users. Like with previous release much time has been devoted to improving the framework and underlying libraries on which KDE is built.

Upgrade your OpenSuse 11 with KDE 4.1

Regular KDE 4 Packages and an openSUSE-based KDE Four Live CD have been available throughout the whole cycle, and final versions of them are also available now. On openSUSE 11.0 you can use 1-click-install to get the KDE 4.1 desktop environment (for openSUSE 10.3 follow link below):

Here

Or you can choose to install a more basic KDE 4 desktop. Developers can also optionally install the KDE 4 build dependencies: all the packages you need to have installed for compiling KDE 4.x from source (experts only).

source:http://linuxpoison.blogspot.com/2008/07/13578175803402.html

tutorial - Block root access to SSH service

SSH (Secure Shell) is a protocol for creating a secure connection between two computers.The secure SSH connection provides authentication and encryption. SSH also provides compression and is most common way for users and root to get connect to the server (Linux), the main reson behind blocking the root user is to allow the admin to login into the box with the default normal user and do the the administrator task using sudo, no direct root login.

1. vi /etc/ssh/sshd_config
3. Locate the parameter -- PermitRootLogin yes
4. Change this to PermitRootLogin no
5. Save and exit
6. Restart your sshd by type /etc/init.d/sshd restart

source:http://linuxpoison.blogspot.com/2008/07/135781758019635.html

tutorial - Free SSH Clients

SSH Client	Operating Systems Supported
OpenSSH	AIX, HP-UX, Irix, Linux, NeXT, SCO, SNI/Reliant Unix, Solaris, Digital Unix/Tru64/OSF, Mac OS X, and Cygwin
FreSSH	NetBSD, FreeBSD, Linux
lsh	GNU/Linux on Sparc, Intel, PPC and Alpha, FreeBSD, Solaris and IRIX
OpenSSH for Windows	Windows
PuTTY	Win32 and Unix
MSSH	Windows
WinSCP	Windows (SCP and SFTP, no SSH)
Fugu	Macintosh
MacSSH	Macintosh
Cyberduck	Macintosh (SFTP only)
pssh	Palm OS
TuSSH	Palm OS

source:http://linuxpoison.blogspot.com/2008/07/135781758011879.html

tutorial - Create your own web based personal desktop - eyeOS

eyeOS is an Open Source Platform designed to hold a wide variety of Web Applications over it. eyeOS was thought as a new definition of Operating System, where everything inside it can be accessed from everywhere in a Network. All you need to do is to login into your eyeOS server with a normal Internet Browser, and access your personal desktop, with your applications, documents, music, movies... just like you left it last time.

With the base system you can find a full suite of applications bundled, some for private use, like the file manager, a word processor, a music player, calendar, notepad or contacts manager. There are also some groupware applications, such as a group manager, a file sharing application, a group board and many more.

The idea behind eyeOS is not to have an Operating System inside an Operating System, or a browser inside a browser. eyeOS is another step in the digital life era:

Being able to work from everywhere, despite of using a full featured modern computer, a mobile gadget or a completely obsolete pc.

Sharing resources easily between different work centers of a same company, or working from different places and countries in the same projects.

Enjoying always the same applications with the same open formats, and forgetting the usual compatibility problems between Office suites or traditional operating systems.

Being able to continue working if you have to leave your local computer or it just crashes, without loosing data or time in solving its problems: Just log in to your eyeOS from another place and continue working.

Check the screen shot below of my personal eyeOS running under Firefox (OpenSuse 11)

To install eyeOS, please follow these steps:

1. Check the Server and Client Requirements.

2. Download eyeOS in your preferred format (tar.gz or zip).

3. Extract its contents to a local directory.

4. Upload the directory within all of its content to your web server.

5. Give full read-write permissions to folder where you have put them and the files itselfs.

6. Now launch the file install.php in your browser and follow the given instructions.

7. If you want to activate the Office Support, please follow the instructions at this wiki page.

8. Now enjoy eyeOS!

source:http://linuxpoison.blogspot.com/2008/07/13578175808121.html

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