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Network security is an ever growing need these days. You never know what you’re going to find when you step out into the wild world of the internet. Luckily we’re all using Ubuntu so we’re much more protected than most of the world, but there still is reason to protect our computers and networks.

For those of you that are not behind a hardware router (if you don’t know this might be you) you definitely want to install a firewall for your system.

Setup a Desktop Firewall with Firestarter : Ubuntu (5.10 / 6.06.1 / 6.10)

And: Using Firestarter


Skype is a little piece of software that lets you make free calls to anyone else on Skype, anywhere in the world. And even though the calls are free, they are really excellent quality. If you and your friends, family or business contacts are using webcams, you can also make free video calls. You can even call landlines and mobile phones at really cheap per minute rates (and there’s no setup or subscription fee).

Install skype in ubuntu

First you need to download the latest .deb package from here using the following command:

Install Skype Instant messenger


As part of my work on Xen I've been playing with Xephyr (a replacement for Xnest). My plan is to use Xen instances for running different versions of desktop environments. You can't just ssh -X to a Xen image and run things. One problem is that some programs such as Firefox do strange things to try and ensure that you only have one instance running. Another problem is with security, the X11 security extensions don't seem to do much good. A quick test indicates that a ssh -X session can't copy the window contents of a ssh -Y session, but can copy the contents of all windows run in the KDE environment. So this extension to X (and the matching ssh support) seem to do little good.

One thing I want to do is to have a Xen image for running Firefox with risky extenstions such as Flash and keep it separate from my main desktop for security and managability.

Xephyr


This article is to guide you thru the installation and system preparation for FreeBSD 6.1. This article is not intended to produce a working system, but is the foundation for the progression to either a desktop system or a server. Once this document has been followed to completion, you may either choose to follow the Server or Workstation documents for your system deployment.

installing_freebsd_6_1


When you install a dual-boot of Ubuntu, one of the frustrating things that you’ll immediately notice is that Ubuntu is now set as the default operating system in the Grub loader. There’s an easy way to switch back to using Windows as the default.

To make this change, you’ll first have to boot into Ubuntu, and then run the following command:


Set Windows as Default OS when Dual Booting Ubuntu


This article is about resizing ext3 partitions without losing data. It shows how to shrink and enlarge existing ext3 partitions and how to merge two ext3 partitions. This can be quite useful if you do not use LVM and you realize that your existing partitioning does not meet your actual needs anymore.

How To Resize ext3 Partitions Without Losing Data


I have mp3 music file all over my file system. I’d like to move them onto specific directory called /mnt/mp3. So how do you find and move all mp3 files to /mnt/mp3 directory?

Simply use find command. It locates all files and then executes a command to move them to /mnt/mp3 (any other directory).

Finding all .mp3 files and move to new directory from shell prompt


A quick note for anyone wondering how to enable core dumps from within most Linux distributions.

1. First, make sure debug symbol are enabled in your project’s configuration (in configure.ac if you’re using autoconf).

HOWTO enable coredumps


Staying in front of your computer for hours and hours with the default fonts can be a challenge on Linux/Unix. I, for one, can't work properly without the Windows fonts comfort Smile

Having the windows fonts working on Unix systems is fairly easy, but on Red Hat-based operating systems such as CentOS or Fedora, can be a real nightmare. The most critical aspect of having the Microsoft fonts to display properly on CentOS in compiling freetype with bytecode interpreter enabled. Let's go through this procedure.

How to display Microsoft fonts like in Windows in CentOS?


More in Tux Machines

Android Leftovers

  • Android Candy: Intercoms
    Ever since my "tiny $20 tablet" project (see my Open-Source Classroom column in the March 2015 issue), I've been looking for more and more cool things to do with cheap Android devices. Although the few obvious ones like XBMC or Plex remotes work well, I've recently found that having Android devices around the house means I can gain back an old-school ability that went out of style in the late 1980s—namely, an intercom system.
  • There's a wild prank hidden in Google Maps that insults Apple in the most childishly inappropriate way
    Rawalpindi is a vibrant Pakistani city known for its bazaars, ancient ruins, and array of religious shrines. But if you pay it a visit on Google Maps, you're going to notice something very unusual on the outskirts of the city — the Android "droid" mascot urinating on the Apple logo.
  • There's an Android bot peeing on an Apple logo on Google Maps
    Sick of all the Apple Watch news today? You're in luck, because we have something completely different for you. An image of an Android mascot, also known as an Android bot or Bugdroid, peeing on an Apple logo has been discovered on Google Maps.
  • An Android robot is peeing on an Apple logo in Google Maps
  • An Android is urinating on the Apple logo in Google Maps (update)
    Google and Apple have always had their differences, but a new Easter egg inside Google Maps has just taken their rivalry to a whole new level. As spotted by Team Android, if you head to these coordinates with the regular Map view enabled, you'll see Google's iconic Android mascot taking a leak on the Apple logo. At the moment, it's unclear who created this little piece of mischief and whether Google is taking action. But if this hidden message is any indication, it was snuck through by a member of the public using Google's Map Maker service, rather than a Google employee. Regardless, it's a crazy (and pretty hilarious) addition that's sure to rile some of the employees in Cupertino. Shots fired!
  • Sony's Android TV-powered 4K televisions are ridiculously thin
    Four models from Sony’s 2015 Android TV-powered 4K television range are now available for pre-order, with shipping to begin in May. The Japanese electronics giant unveiled its 4K TV lineup for 2015 at the Consumer Electronics Show in January, but kept pricing and release information to itself, only saying the new sets would be available sometime in the spring. Those details are finally here and the TVs themselves aren’t far off.
  • Android Wear v1.1 APK has Apple references in it, but when is iOS support coming?
    That Google is working on iOS support for Android Wear is nearly undeniable at this point, but even more evidence has surfaced in case you aren’t a believer. We peeked inside the latest Android Wear update APK to see what hidden bits were swarming about, and we came across some very interesting references.
  • 5 Things to Expect from the Nexus 5 Android 5.1.1 Release
    A few weeks ago, an Android 5.1.1 update mysteriously appeared alongside an update for Google’s Android SDK. Earlier this week, Google finally confirmed the Nexus Android 5.1.1 release with an update for its Nexus Player. With an Android 5.1.1 update now on the minds of Nexus users, particularly Nexus 5 users dealing with Android 5.0 Lollipop problems, we want to take a look at what we expect from the Nexus 5 Android 5.1 release from Google.

The Turing Phone Is Super Durable and Ultra Secure

The device also sports a 13MP/8MP camera combo, 64GB / 128GB of internal storage and runs Android 5.0 Lollipop out of the box. Read more

GNU/Linux Share of Global Page-Views Reaches New High

Eight days in April, 2015, so far, have reached 2% share of page-views for GNU/Linux on the desktop worldwide, according to data from StatCounter. Read more

Linux Kernel 4.0 Update Kit Now Available for Black Lab Linux 6.5, Ubuntu 15.04

Roberto J. Dohnert announced the immediate availability of the Linux Kernel 4.0 Update Kit for his Black Lab Linux computer operating system, allowing users to update to the newly released Linux 4.0 kernel. Read more