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How To download YouTube on your harddisk is a many asked question.

This tutorial shows You how to record Your favorite YouTube videos on Your computer.
You need the Mozilla Firefox Webbrowser. this is included with Ubuntu
If you have Windows you can download Mozilla Firefox for free.

Click here to watch the video how to save your favorite YouTube Videos on your computer

To run a 64-bit version of Windows or Ubuntu, your computer must have a 64-bit-capable processor.

To find out if your processor is 64-bit-capable, do the following:

Open Performance Information and Tools by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Security, and then clicking System, then clicking Windows Experience Index, and then clicking View and Print Detailled performance and system information

Click View and print details.

In the System section, you can see what type of operating system you're currently running under System type. Under 64-bit capable, you can see whether you can run a 64-bit version of Windows. (If your computer is already running a 64-bit version of Windows, you won't see the 64-bit capable listing.)

If you are running Linux or have access to Live Linux media, open the terminal prompt and run:

grep --color=always -iw lm /proc/cpuinfo

If this command returns lm (Long Mode) as one of the flags, then your processor is capable of 64-bit.

Bluetooth on Ubuntu 11.10

Bluetooth is something that's supposed to be work out of the box but frequently is not working at all.

That's why every time I install a new Ubuntu version I test if bluetooth is working.

So, fresh ubuntu 11.10, client is LG 350 phone.
Receiving files works fine.
Pairing initiated from the computer works fine.
Sending files - failed with the a 'permission denied error'. After searching/asking I've come across a bug report.
Since I still need to send files I have to mount my phone with obexfs. In short:

Now make sure your computer can scan your cellphone:
Turn your cell phone on.
Select settings on your cell phone

select connections
select buetooth
select bluetooth settings
select visible Done, now your computer is able to scan your cell phone.

Now install obexfs on your computer
install obexfs (the easiest way is via Ubuntu Software Center or Synaptic) or via terminal and run this command
sudo apt-get install obexfs

pair the phone with the PC (works from the gui)
Get the device MAC and mount it with obexfs:

If you are running Linux or have access to Live Linux media, open the terminal prompt and run:

lsb_release -a

The Ubuntu version will be displayed on the screen.