How to do Port Scanning with Nmap

by Paul Joyce

Network Mapper, usually just known as Nmap, is a powerful yet compact tool to have in your arsenal, giving you the power to explore a network and scan ports of various targets you find. Network and system administrators should know about this tool, its very helpful in debugging certain networking problems. It is however predominantly […]

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How to use Linux’s Traceroute (3 Examples)

by Paul Joyce

Connections over a network often need debugging but due to the nature of the networking-beast, the actual topography of the network may be unknown. Connections are usually perceived as going from A to B, for example your desktop computer connects to Amazons website. To help expose the exact topography of a network we can use […]

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Linux: Changing your password from the CLI

by Paul Joyce

We all know that passwords are some of the most important pieces of information we have to remember, but on top of that we’re told we should change them regularly. This is all well and good, but do you know how to change your Linux password when you can’t get into the X windows manager? […]

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Chrome locking up with .pki/nssdb directory error

by Paul Joyce

After re-installing Ubuntu 12.04 back on my laptop I noticed that Google Chrome was quite unstable. I was using version 28.0.3, but every time I opened it up it asked if I wanted to set it as my default browser. Every time I clicked yes. Every time it failed to remember it when I came […]

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Updating Chromium on Debian 6 (Squeeze)

by Paul Joyce

Switching between Ubuntu and Debian machines, you notice the benefits of both system OS’ quite quickly. The first major thing you’ll probably have noticed with Debian 6 (Squeeze) is that its bundled with Chromium. After a bit of use though, you’ll also notice how unstable Chromium is. Lots of web pages freezing up, tabs not […]

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How to upgrade Ubuntu to 12.10 – Quetzal

by Paul Joyce

The Quantal Quetzal release date, 18th October 2012, has been and gone, which means we can all upgrade Ubuntu to version 12.10, whoop! Sadly being super busy with work I’ve only just got round to doing it. Quetzal is largely an update to tackle graphical user interface changes, such as iconography, typography and the menu […]

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Salting passwords – how & why?

by Paul Joyce

Our lives are now run by passwords. We’re forced to remember more passwords everyday it seems. How can developers secure passwords more securely? Why is salting passwords important and how does using salts improve the strength of stored passwords? Consider this; what happens if the online store you run is hacked and all your customers details lifted? Hopefully all […]

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Ubuntu won’t boot without USB stick

by Paul Joyce

As some of you may remember, a few weeka ago I posted an article about installing Ubuntu from USB (If you can’t remember, check it out!), which explained how to get an ISO running on a machine without an optical device. Well it turns out that wasn’t entirely the end of the situation for some… […]

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MCrypt – Securing your Linux files with Twofish Cryptography

by Paul Joyce

With more and more details being stored on computers, it’s getting exponentially more important to keep them safe and secure. From internet banking to Facebook, renewing car tax to ordering presents on Amazon, you have entered a lot of data onto your computer. But how do you keep files of a sensitive nature secure?  Could something called […]

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Installing Ubuntu from a USB Stick

by Paul Joyce

Need to install the Ubuntu operating system from a USB device but not sure how? Perhaps you’re installing it on a netbook and don’t have a CD drive. Here’s a short article explaining how to get the ISO on a USB FDD and how to get that all installed on your PC.

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