Hardening Linux : BASTILLE-LINUX

1.   Linux is gaining its pace in gaining new user base daily pan globe and with this increase it becomes all the more important to harden it because now Linux will soon be of interest to hackers....and in this post I am giving a brief introduction about Bastille, a software tool that eases the process of hardening a Linux system, giving you the choice of what to lock down and what not to, depending on your security requirements. It bundles many of the tasks routinely done to securely configure a Linux system into one package.It is a set of Perl scripts that run as an interactive program, asking questions for each step of the hardening process. The scripts explain each step well, enabling you to understand what security measures will be introduced by any changes you make and why. Bastille can also optionally save your choice of options to a file for remote deployment to other machines.

2. Bastille currently works with Red Hat, Fedora, SUSE, Debian, Ubuntu, Gentoo, and Mandriva distributions, as well as HP-UX. A beta version is also available for Mac OS X. Most of the distributions Bastille supports have it available as a package that you can install with the default package manager for the distribution. Once it is installed, just run Bastille as root.After you install it vide the Ubuntu Software centre,the ways to use and configure is shown vide screen-shots below :

[SOLVED] : result code ns error failure virtualbox

1. If you ever get this message "result code ns error failure virtualbox" while you use virtual box...don't you worry...simple steps will resolve as follows:.

The screens you see are shown below first just to ensure that your and mine problem is same :

2.    So first thing is your remove Virtual box from the Ubuntu Software Centre or you can remove the same manually from terminally as root with the following commands :

sudo apt-get remove virtualbox-\*

sudo apt-get purge virtualbox-\*

init 6

sudo sh -c "echo 'deb http://download.virtualbox.org/virtualbox/debian '$(lsb_release -cs)' contrib non-free' > /etc/apt/sources.list.d/virtualbox.list" && wget -q http://download.virtualbox.org/virtualbox/debian/oracle_vbox.asc -O- | sudo apt-key add - && sudo apt-get update && sudo apt-get install virtualbox-4.3 dkms

3.     These 4 commands from the terminal should get you through!!! all d best

Installing Dongle on Ubuntu : Mobile Internet@USB MODEM

1.   Writing after a long time... I post here few lines that I recently learnt on installing and accessing internet vide Dongle with SIM on Ubuntu LTS 12.04.So in my case I have a Micromax dongle with a mobile Sim.

2.  Simply said the steps are mentioned below :

- Insert the USB dongle in any of the USB drives on your PC/Laptop.

- Goto Terminal and login as Root

- At the terminal get the details of the usb detected interfaces by typing lsusb

- So in my case the dongle detected is shown at the end ie OMEGA TECHNOLOGY

- Now we need to run a terminal command to mount the device and get it running as shown in the screen shot below

sudo modprobe usbserial vendor=0x1c9e product=0x9605

- Once the command is executed at the terminal,wait for few minutes and you see the additional ENABLE MOBILE BROADBAND as seen in the screen shot below....

 

 

3.   and with this you should be on with the internet....

Power of PING

In our respective interactions with various networks accessible to us.....as administrators we keep pinging so many IPs for testing the connectivity at various times like ping 192.121.23.1 etc....and we get a response...but ping it self has so many switches that most of us hardly use......i came across a chart today that in a summarized form tells the switches of ping command with examples and a brief explanation.....sharing here with you...thanks http://www.activexperts.com

ping -c count	ping -c 10	Specify the number of echo requests to send.
Ping -d	ping -d	Set the SO_DEBUG option.
Ping -f	ping -f	Flood ping. Sends another echo request immediately after receiving a reply to the last one. Only the super-user can use this option.
Ping host	ping 121.4.3.2	Specify the host name (or IP address) of computer to ping
ping -i wait	ping -i 2	Wait time. The number of seconds to wait between each ping
ping -l preload	ping -l 4	Sends "preload" packets one after another.
Ping -n	ping -n	Numeric output, without host to symbolic name lookup.
Ping -p pattern	ping -p ff00	Ping Pattern. The example sends two bytes, one filled with ones, and one with zeros.
Ping -q	ping -q	Quiet output. Only summary lines at startup and completion
ping -r	ping -r	Direct Ping. Send to a host directly, without using routing tables. Returns an error if the host is not on a directly attached network.
Ping -R	Ping -R	Record Route. Turns on route recording for the Echo Request packets, and display the route buffer on returned packets (ignored by many routers).
ping -s PacketSize	ping -s 10	Sets the packet size in number of bytes, which will result in a total  packet size of PacketSize plus 8 extra bytes for the ICMP header
ping -v	ping -v	Verbose Output. Lists individual ICMP packets, as well     as Echo Responses

Print to PDF in Ubuntu 12.04 LTS

1.     This is a simple single line of command that u write at the terminal to install a third party app that will install a pdf printer in ur Ubuntu System.

sudo apt-get install cups-pdf

2.     This will be generally handy when u need to print your documents that are ready to print but u don't have a printer installed....actually create a virtual PDF printer on your ubuntu PC that lets you convert all your documents/images/anything into PDFs that you can subsequently send to print as and when u have the facility to print.

3.    Thanks http://ubuntuportal.com