Ubuntu blogs

Password Guessing with THC-Hydra

Hydra is available for Windows and Linux. I’ve used both, however if you have the need for speed, Linux is the way to go. I’m sure you’re itching to get started so I’ll stop yapping.

Hydra in its most basic form requires 4 items;

1. target IP address
2. user name (to be used during login process)
3. password (to be used with above username)
4. service (to be brute forced)

hydra -l administrator -p password 192.168.0.1 ftp

However this isn’t much fun, not to mention time consuming. Who wants to re-issue the following command over and over again manually.

Instead you can utilize a text file and store passwords you want to try. Hydra can pump through a large text file in minutes.

The easiest switches to remember are -l / -L and -p / -P

Password guessing as an attack vector

Over the years we've been taught a strong password must be long and complex to be considered secure. Some of us have taken that notion to heart and always ensure our passwords are strong. But some don't give a second thought to the complexity or length of our password. Password guessing in my view is the oldest hack in the book, and unfortunately some of us are making it too easy for the bad guys. From simple things like password equal to username (I still see this often) to blank passwords or super easy combination's like 'qwerty'. As a system Administrator it is our job to serve and protect. However, despite our best efforts users often give things away too easily. Therefore how do we know our users are doing the right thing and how can we audit poor or weak passwords.

New to ubuntu

I AM HAVING SOME DIFFICULTIES IN INSTALLING SOME SOFTWARE LIKE PDF READER CAN SOME ONE HELP

Active Directory Integration with Centrify DirectControl Express on Ubuntu 11.10 (Oneiric)

Centrify Express is a comprehensive suite of free Active Directory-based integration solutions for authentication, single sign-on, remote access, file-sharing, monitoring The #1 Choice for Active Directory Integration and cloud security for cross-platform systems. It is the quickest and most proven solution for integrating UNIX, Linux and Mac systems with Windows, and delivers more functionality and more to upgrade to when compared to other free offerings.

Many Ubuntu users and Administrators struggle with Active Directory integration. One approach that folks are using is the free offerings from Centrify Express.

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Stunnel - Universal SSL tunnel for network daemons

The stunnel program is designed to work as an SSL encryption wrapper between remote client and local (inetd-startable) or remote server. It can be used to add SSL functionality to commonly used inetd daemons like POP2, POP3, and IMAP servers without any changes in the programs’ code. Stunnel uses OpenSSL libraries for cryptography, so it supports whatever cryptographic algorithms you compiled into your library.

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tool cahin for various processor

how to make own tool chain in linux opensuse 11.1 and hoe to use it. i want to get the material for this so please help me

Computer won't connect to internet

I'm having some problems with a residential computer that is running Ubuntu 9.10
It has worked fine for years. Client moved to a new home and has Comcast cable internet.
A couple of Comcast techs got him up and running after some head scratching.
It worked fine for a couple weeks but now he can't connect to the internet.

I've tried turning the power and and off on the modem.
I've checked the cable connection between the modem and the computer.
I'm connected through an ethernet cable.

The computer says that a successful network connection is established but no browsers will work.
I've tried Firefox and Opera. Also I get an error when I attempt to download updates.

Any ideas for where I should start troubleshooting this problem?

update error

Ever since I upgraded to 11.10 from 11.04 I get the following error when I download and install new up dates.

installArchives() failed: Preconfiguring packages ...
Preconfiguring packages ...
Preconfiguring packages ...
(Reading database ...
(Reading database ... 5%%
(Reading database ... 10%%
(Reading database ... 15%%
(Reading database ... 20%%
(Reading database ... 25%%
(Reading database ... 30%%
(Reading database ... 35%%
(Reading database ... 40%%
(Reading database ... 45%%
(Reading database ... 50%%
(Reading database ... 55%%
(Reading database ... 60%%
(Reading database ... 65%%
(Reading database ... 70%%
(Reading database ... 75%%
(Reading database ... 80%%
(Reading database ... 85%%
(Reading database ... 90%%
(Reading database ... 95%%
(Reading database ... 100%%
(Reading database ... 176231 files and directories currently installed.)

GoAccess - Visual apache/Nginx log analyzer

GoAccess is an open source real-time Apache log analyzer and interactive viewer that runs in a terminal in *nix systems. It provides fast and valuable HTTP
statistics for system administrators that require a visual server report on the fly.

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Install Mplayer and Multimedia Codecs (libdvdcss2,w32codecs,w64codecs) on ubuntu 11.10 (Oneiric)

MPlayer is a movie and animation player that supports a wide range of codecs and file formats, including MPEG 1/2/4,DivX 3/4/5, Windows Media 7/8/9,RealAudio/Video up to 9, Quicktime 5/6, and Vivo 1/2. It has many MX/SSE (2)/3Dnow(Ex) optimized native audio and video codecs, but allows using XAnim’s and RealPlayer’s binary codec plugins, and Win32 codec DLLs. It has basic VCD/DVD playback functionality, including DVD subtitles, but supports many text- based subtitle formats too. For video output, nearly every existing interface is supported. It’s also able to convert any supported files to raw/divx/mpeg4 AVI (pcm/mp3 audio), and even video grabbing from V4L devices.

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GNOME Tweak Tool - A tool for changing specialised or advanced GNOME3 settings

GNOME Tweak Tool is an application for changing the advanced settings of GNOME 3

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How to install Gnome Shell in Ubuntu 11.10 (Oneiric Ocelot)

GNOME Shell is the defining technology of the GNOME 3 user experience. It provides core interface functions like switching to windows and launching applications. GNOME Shell takes advantage of the capabilities of modern graphics hardware and introduces innovative user interface concepts to provide a delightful and easy to use experience.

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Linux Mint - The Trio

Linux Mint's claim to fame is usability and the search for the perfect Linux desktop. As a distribution Mint arrived on the scene in 2006 with release 1.0 code named "Ada". It never formally made it as a stable release, resulting in little fan fare. However with release 2.0 codenamed "Barbara" Linux Mint made its mark on the community. Over the next 2 years Mint released 5 versions and if you haven't guessed it already they were all codenamed after feminine first names.

Under the hood, Mint borrows heavily from Ubuntu, in fact over the years they've adjusted their release cycle to coincide with Ubuntu. However in 2010 they released a Debian centric release independent of Ubuntu. Unlike most Linux distributions (with a single software branch) Linux Mint has 3 separate releases.

Linux Mint LMDE (Debian)
Linux Mint LXDE (Ubuntu with XFCE)
Linux Mint (Ubuntu with Gnome)

Help

I'm new to ubuntu/linux and currently I'm learning how to use commands in the terminal and every time it asks for my password it won't let me type it im using ubuntu 9.10 on acer extensa 5220

Useful Ubuntu Linux Tips

My interest in linux first sprouted when I was a junior student. I used to play with RedHat 7 then, mostly CLI. After a few years of professional experience in different windows, I resumed my journey in linux during my master’s program in 2009, in fact, after my xp box got infected by virus. Since then, I have been using Ubuntu 8, 9 and 10 (Lucid Lynx, aka L linux). When I was using windows before, I would always like to have my own customized theme and settings which constantly drove me to follow even after using ... more on this link-

http://punnyatuladhar.wordpress.com/2011/09/11/useful-ubuntu-tweaks/