Posts Tagged Tutorial

Can I connect to an amazon instance and create more instances?

Can I connect to an amazon instance and create more instances? I have heard this question several times now and the answer is yes. You are limited to running 20 On-Demand and 100 Spot Instances per region with Amazon EC2. If that not enough for you then you’ll need to file a Request to Increase the EC2 Instance Limit, to use more instances.

Each instance is basically a virtual machine running on amazons infrastructure, and each instance is allocated its own address allowing you to connect to it. Because each instance runs independently you can connect to as many as you want simultaneously. Read the rest of this entry »

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Save Outlook 2010 Archive Remotely

Save Outlook 2010 Archive Remotely

Have you ever had your computer lost or stolen, had to format it, or had a corrupted HDD, well if you have you’ll know its a pain, especially when trying to get you data back. Now with high-speed networks and cheap storage its becoming more common to backup are data remotely. This helps reduce data lost in the event your computer is lost or damaged.

This is all fair and well for your documents, you just copy them to a remote server and you can sleep safe in the knowledge your files will be OK. But what about your emails, these can be just as important, if not more, then your documents, in fact someone told me the other day that his emails were like is calendar and identity and would be completely lost without them, so its worth ensuring they are all backed up correctly. Read the rest of this entry »

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How to edit Host File Windows 7

The host file in windows is a file that maps host names to IP Address. This works much like a simple DNS, however only one Host Name can go to one IP Address. This can be useful in many situations, for example if you are setting up a small office and don’t have the resources for a DNS you could set-up a host file to resolve internal Host Names for you.

Back in the days of Windows XP and NT all you had to do was open you host file and edit the data. But when windows Vista and 7 came along things became a bit more complicated as you have to open as administrator, so what if your not logged in as an administrator? Read the rest of this entry »

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Find Mailbox Size In Outlook 2010

How do you know how much space your emails are taking up on your computer. Well if you are using outlook there is a simple way to find out how much space your using.

Outlook stores all its emails in something called a data file (or .pst file) these can usually be found in your local settings folder (“C:\users\[USER NAME]\AppData\Local\Microsoft\Outlook”). In outlook 2010 these data files are shown as either your Mailbox, Archive or Personal Folders. So how do we find out how big these files are: Read the rest of this entry »

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Extenting Your Laptop Battery Life

Laptop batteries are generally Lithium-ion batteries, they work buy moving Lithium Ions from the negative electrode to the positive when being used and the opposite when they are charging. They are often used for laptops as they have the best energy-to-weight ratio of all the battery types and only slightly loose change when not in use (about 5-10% per month).

They do, as many of you will know, have several disadvantages, the most prominent being their shelf life. When you charge a Lithium-Ion battery it causes deposits in the electrolyte (much like limescale in your kettle). These deposits reduce the total charge of the battery as well as increasing internal resistance. This is why your laptop batteries eventually die and why laptop manufactures do no cover batteries under warranty, classing them as consumables. Read the rest of this entry »

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Add NRPE host to Nagios

nagios Logo NRPE (Nagios Remote Plugin Executor) is a Nagios agent witch allows for remote system monitoring by executing scripts on a remote system allowing monitoring of disk usage, system’s load or number of users currently logged in and much more.

Normally Nagios can only monitor public services such as HTTP & FTP. This is great if you only want to monitor public servers, however I bet that most people want to monitor their own servers and have access to private information, that’s were NRPE comes in. It works on a client server basis, you install a daemon on the machine you want to monitor, then setup your Nagios server to connect to the remote daemon to gather information Read the rest of this entry »

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IP Address Basics

Network Lead with some IP address stuffIf you want communicate with someone then you’ll need some kind of address, weather this be an house address, telephone number or even email, otherwise how will your message reach its destination. This is the same for computers, for one computer to talk to another (i.e. a network) then each computer needs to have an address. This is called an IP Address (Internet Protocol Address) and nearly every computer with a network card will have one. So how do IP Address work and how do they affect me? Read the rest of this entry »

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Top 10 uses for Dedicated/Cloud server

So you want a Dedicated or Cloud server, or you already have one and you want to know what to do with it, well there are many uses for remote servers, just check out the long list at ubuntu.com. But witch ones are actually worth installing, well that depends on your needs, if you need a web-server then install LAMP, if you need a chat server install IRC. But its always good to look at other servers you can install because it might inspire you to improve your service, If you are already running a popular website on a LAMP server you might not realise you could install an IRC server and provide your readers with a chat room. So read on for my Top 10 uses for a sever Read the rest of this entry »

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Setting Up an Basic IRC Server on Ubuntu

IRC Funny Cartoon Ahh the good old IRC server, these things have been letting people chat to each other since 1988. In there most basic form they are chat room servers, pretty much every chat room you’ve used on a web page is connecting to an IRC server. They definitely have a place in computing history as they were used to report on the 1991 Soviet coup d’état attempt and Gulf War during media blackouts.  But they have become much more then simple chat rooms, they allow for: File Transfer, Encryption, Proxy, Colour, Channels, Users, and even chat bots.

Sadly the IRC chat room  are being replaced by things like MSN and Facebook messenger. They are great to install on web servers because they allow you to include chat rooms into your websites, or just to play with something that’s been such an important part of computing history. Read the rest of this entry »

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Donate you Spare CPU Time to Science

I’m talking about Folding@Home, the distributed computing project that runs throughout the world to make one of the largest supercomputers in the world. The project is running large scale simulations on Protein Folds to try and cure diseases like Alzheimer’s, ALS, Huntington’s, Parkinson’s disease, and many Cancers.

So how can your server help, well I bet your server CPU’s hardly ever runs at a high load, otherwise you would be setting up faster processes and more servers, but it does seem wasteful having all these spare cycles just in case you get a surge in users. Well folding@home is clever it will never let your load average go much above 1.0 and if you start experiencing a surge in users folding@home will automatically throttle its CPU use, meaning your users will not be effected. So how do you install and run Folding@Home: Read the rest of this entry »

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