Tutorials

Thunderbird and PGP a guide.

niksanjehoofd — Mon, 17 Nov 2008 19:15:57 -0600

The body of this post is too short so please see attached .pdf

Fwknopping your way to success with Single Packet Authorisation

tel0s — Tue, 23 Sep 2008 06:22:50 -0500

Single Packet Authorisation using FWKNOP

Port knocking
Security is always an issue, and you can never be too careful. If your a security nut such as myself, Port knocking, and the more effective Single Packet Authorisation methods are invaluable.

Port knocking is a method by which you can keep services running on your machine hidden from the outside world, and is another layer of authentication for a malicious user to get through.

Upgrading from Debian Etch to Debian Lenny

zubenel — Fri, 30 May 2008 17:23:06 -0500

I will do the terminal and Synaptic GUI method to satisfy all users:
Synaptic GUI;
Go into Synaptic -> settings -> repositories.
Replace etch with lenny.
Unclick any etch cd repositories.
Reload repositories.
In search mode find debian-archive-keyring.
Upgrade and apply.
After this click Upgrade and then click apply.
Follow install prompts.

Aptitude terminal commands in root mode;
Change etch to lenny in /etc/apt/sources.list.
Comment out any etch cd repositories.
$ apt-get update

OpenVZ - amendments to /etc/sysctl.conf file

zubenel — Fri, 23 May 2008 15:52:56 -0500

As requested at my recent talk here are the amendments to the /etc/sysctl.conf which must be made for the networking kernel parameters prior to booting the OpenVZ kernel. I have included commented lines.

Original /etc/sysctl.conf entries:

Configuring Thunderbird to fetch your Google mail.

GordonC — Sun, 18 May 2008 10:25:33 -0500

This is just a short guide for people who are unsure about how to do the above. It probably won't be useful to everyone but I hope that it'll educate at least one person who didn't previously know how to do this.

Step 1: Configure Google Mail
-------------------------------

Download .flv Videos for offline viewing

GordonC — Fri, 11 Apr 2008 12:15:38 -0500

Here's a tip I came across on the Ubuntu forums. Its a rather obvious one but quite useful.

You've all likely heard of YouTube , Google Videos and other websites that use a flash player they've made to stream .flv files to your computer. When it streams it obviously has to stick the .flv somewhere in your system temporarily. So where do temporary files go in the linux file system? You've probably got it by now. The /tmp folder.

So here we go with a step by step:

1. Browse to a YouTube video using your favourite browser.

Kismet, GPSDrive, Google Earth Howto War Driving Guide

finux — Thu, 10 Apr 2008 10:12:10 -0500

Kismet, GPSDrive, Google Earth Howto War Driving Guide - Audio Recording of this Guide is Available from www.linuxbasement.com from the 11th of April 2008

Technical Ability = Medium - Configuration of .conf files using a text editor, ability to run commands as a root user. Use of either package manager or compiling software from source code.

Packages To Be Installed;

Kismet, gpsd, GPSDrive, MySQL server and client, MySQL python Interface

Test Kernel Taken from the infamous tayLUG mailing List

finux — Mon, 31 Mar 2008 10:18:35 -0500

[dundee] Taylug Weekly Articles 16 - OSBC

Andrew Clayton

Using VPN to network Virtual Machines to each other and to the Guest OS

finux — Sun, 30 Mar 2008 17:06:22 -0500

Using VPN to network Virtual Machines to each other and to the Guest OS

I find this to be one of the easiest and securest ways of networking virtual machines (VM) to each other, and to the host OS (operating system). It uses Virtual Private Network software (VPN) called hamachi, which is free to download, however it is freeware not free software (for more information about free software visit this web site http://www.fsf.org)

A Twitter Command for Your Terminal

finux — Fri, 28 Mar 2008 14:56:21 -0500

A Twitter Command for Your Terminal

Well Twitter seems to be getting popular now, and it's pretty we documented that it can be used via the command line terminal if CURL is installed. The below is how to make a twitter command for your terminal. You will obviously need to have a Twitter account registered, and you can do that by going to this web address https://twitter.com/signup

The first thing to do is to install curl if it isn't already installed

sudo aptitude install curl

Installing Safari with Flash and Shockwave under Ubuntu with Wine

finux — Thu, 27 Mar 2008 11:50:38 -0500

Installing Safari with Flash and Shockwave under Ubuntu with Wine

Well guys i thought that i would post this for any of you that maybe developing web sites or heaven forbid your thinking firefox is too slow for you.

This is somewhat borrowed from this web site http://www.ubuntu-unleashed.com/2008/03/howto-install-safari-on-ubuntu-w...

Who am i kidding it's all borrowed from this how to guide.

Unix Cheat Sheet

toxicnaan — Sun, 23 Mar 2008 18:26:52 -0500

http://cb.vu/unixtoolbox.xhtml - Original Here.

Unix Toolbox

This document is a collection of Unix/Linux/BSD commands and tasks which are useful for IT work or for advanced users. This is a practical guide with concise explanations, however the reader is supposed to know what s/he is doing.

Unix Toolbox revision 11

Staircase affect with vim pasting

toxicnaan — Fri, 21 Mar 2008 21:26:38 -0500

Staircase affect with vim pasting

Found on the Gentoo forums, and excellent tip on how to avoid that annoying staircase affect when you paste multiple lines into the VIM editor.

Add the following to your .vimrc file

nnoremap :set paste!

http://scotgate.org/?cat=3

http://forums.gentoo.org/viewtopic-t-543109.html

Perl script to rename web files and links

Kirok — Tue, 18 Mar 2008 13:40:00 -0500

This is a little Perl script I had to write for a piece of coursework I've posted the code below and attached the file with an extra .txt extension, its far from the best coding but it should:

Assist in the maintenance of a web site by allowing the HTML file for a web page to be renamed and automatically update the links in any other pages to refer to the new name, only for a single directory however as recursion is not enabled.

Calling all twitter'ers, use twitter from the command line

finux — Wed, 12 Mar 2008 05:21:00 -0500

Hi Guys,

If any of you are using twitter here's a great tip.

First you need to install Curl if you don't have it already, should be pretty easy to find. For all your Ubuntu & Mint users, i imagine would be the same for you Xandros (eee) users too users, pretty common package so it should be in most package managers;

sudo aptitude install curl

Then all you need do is put the following commands in to the a terminal

centralised bittorent server, using rtorrent + rtgui

azmodie — Mon, 10 Mar 2008 16:48:57 -0500

More and more people are running home Linux servers.
The reason for this is home web-servers. development environments, mail servers, file servers, Print Servers etc..

Another good addition to the home server is centralised bittorent server. especially if there are more than one user.

auto reboot after kernel panic

huntly — Mon, 03 Mar 2008 08:38:32 -0600

Got a nice wee tutorial through my email today, thought i would share it with you guys. I found it usefull cause i used to get random panics on boot (diagnostics with lee found that the USB mouse was causing the problems)

Heres the link anyways

www.builderau.com.au/program/linux/soa/Auto-reboot-Linux-after-a-kernel-panic/0,339028299,339286434,00.htm

SSH to a Server

zubenel — Wed, 27 Feb 2008 08:10:25 -0600

In your Linux distribution check that the openssh-clients package is installed (normally it is by default). Open up a terminal in user mode (not root mode), you will be generating a private and public ssh key pair.

$ mkdir ~/.ssh

$ ssh-keygen -q -f ~/.ssh/id_rsa -t rsa

Finding a File

huntly — Tue, 26 Feb 2008 18:57:10 -0600

This is short and sweet. Use of the locate command in the terminal can help you find the destination of a file. For instance, tonight I was trying to find out where the tomcat web server start-up script was stored.

I knew it was called startup.sh so I typed at the prompt: $>locate startup.sh This returned /usr/local/tomcat/bin/startup.sh

Convert PDF to HTML.

toxicnaan — Tue, 26 Feb 2008 17:39:27 -0600

http://www.ubuntugeek.com/howto-convert-pdf-files-to-html-files.html

Translates pdf documents into html format.Translates pdf files into HTML or XML formats, combined with png images. Supports encrypted pdf files.There is a program called pdftohtml to convert pdf to html file.In ubuntu gutsy this package in bundled with poppler-utils so we need to install this package.

Install poppler-utils in Ubuntu

sudo aptitude install poppler-utils

This will complete the installation

Using pdftohtml

pdftohtml Syntax

An easy way to find missing libs while compiling from source: apt-file

jamiecramb — Mon, 25 Feb 2008 14:41:38 -0600

Hey folks,

Found this a week or two ago when I was struggling to compile some apps from the source due to missing dependencies and thought I would share it as I've not posted on here yet, and its also a dam handy tool!

Perl Programming Course

tkgafs — Mon, 25 Feb 2008 08:31:46 -0600

The attached file [which is only visible if you are logged in] is really a zip file but has been given a .jpg extension to allow it to be uploaded

please rename it from Perl-Course_zip.jpg to Perl-Course.zip when you have downloaded it.

The zip file expands to a directory,

which contains a document in rtf format which is the course notes

suggested solutions to the exercises

and test data required for a couple of the programs

Add-On's Firefox - Compatiable

finux — Mon, 25 Feb 2008 06:57:02 -0600

Okay this is actually a tip by Azmodie (aka special K),

When i upgraded to firefox 3 i noticed most of my add-on's didn't work. He suggested i download the nightly build tool kit, which has a compatibility tool for add-on's. Install that, and then load each individual add-on that wasn't compatible one by one.

Worked fine, and now my fav add-on's are back

Well done azmodie

gnunzip to a sparse file

toxicnaan — Sun, 24 Feb 2008 08:42:52 -0600

gunzip -dc test_t43p.gz | cp --sparse=always /dev/stdin test_t43_outo

will gunzip test_t43p.gz and create a uncompress but sparse file
test_t43_outo.

Netstat - How to read it

toxicnaan — Sat, 23 Feb 2008 20:28:22 -0600

tcp 0 0 192.168.22.6:55017 www.oreillynet.com:www ESTABLISHED

^    ^  ^     ^          ^           ^             ^           ^
|    |  |     |          |           |             |           |  
|    |  |     |         port         remote      port      Connection
|    |  |   your machine             server                  State
|    |  bytes in send queue
|    Bytes in recive queue
| type of connection

Connection State can be

Create a sparse file

toxicnaan — Sat, 23 Feb 2008 14:07:37 -0600

To create a sparse file do

dd if=/dev/zero of=sparse-file bs=1 count=1 seek=1M

Will create a file of one megabyte in size, but with only one byte 
actually stored on disk.

Learn Unix in 10 Mins.....

toxicnaan — Fri, 22 Feb 2008 07:05:01 -0600

I found this , and thought it was pretty cool.

http://freeengineer.org/learnUNIXin10minutes.html

FREEENGINEER.ORG

Preserving a Sparse File during copying

toxicnaan — Fri, 22 Feb 2008 06:52:31 -0600

Level: Advanced

Okay, say if you have a large virutal machine image, that you have
copied from your external usb drive to your harddrive.

Myimage.img 4G

If the file contains a lot of zero blocks , you can convert the file to
a sparse file with.

cp --sparse=Myimage.img mysparseimage.img

ls will report it's the size of the file.

du mysparseimage.img will report the actual size on disk.

http://freshmeat.net/projects/phantom/

Find largest file in directory subdirectories

toxicnaan — Fri, 22 Feb 2008 06:06:36 -0600

du -all |sort -nr|more
will find all file sizes in the current directory/subdirectories and sort
them by size.

or

find / -size +1G -exec ls -l {} \;

find all files bigger than 1Gigabyte on the whole system

Find all Setuid and Setguid file on your system.

toxicnaan — Fri, 22 Feb 2008 05:59:18 -0600

find / -type f $ -perm -04000 -o -perm -02000 $ \-exec ls -lg {} \;

http://en.wikipedia.org/wiki/Setuid