Boot up a Linux Operation System from a USB Flash Drive

Linux Live Operation System become handy when your Windows OS crashed, you can boot up your computer with the USB Linux OS Flash Drive, and backup all your important data; or use it to install to a Laptop, a Netbook that has no CD-ROM Drive.

Fedora 12 - a Linux Live OS is automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals.
It is not necessary to install anything on a hard disk. 

Fedora (Download here) makes it very easy to create a bootable USB stick with the Live USB Creator tool.

You can also tell the tool how much persistent storage to reserve on the USB stick. This space can be used to save files and make modifications to the LiveCD image, allowing you to boot and run Fedora with any changes you make.


Insert the USB Flash Drive to use (should be at least 4GB in size), and when you have chosen which version of Fedora on a Flash Drive to install, or have supplied your own LiveCD image, click the Create Live USB button. Make sure that the target device shows up properly; if it isn’t already selected, make sure you select the correct device (i.e., /dev/sdg1 on Linux or ‘E:’ in Windows). Note that the install is completely non-destructive, so the device can contain other data as well.

When the Live USB Creator is completed, you can eject the USB Flash Drive, insert it into your other computer (or reboot the existing computer) and indicate in the BIOS or via boot selection at startup which device to boot from. Select the USB Flash Drive and watch Fedora boot, at which point you can either select to use Fedora as installed on the USB Flash Drive, or use it to install Fedora onto the computer.

Use iPhone as an internet wireless modem

If you have iPhone and travel a lot, you could use your iPhone as an internet wireless modem on a laptop,  and laptop has bigger screen and more power for the programs,  with 3G internet connection on your iPhone, you may have speed download up to 902kbps (112.8KB/sec transfer rate), and upload up to 215kbps (26.9KB/sec transfer rate), therefore, you can do Skype video conference call,  web browsing and viewing web page with Adobe Flash which iPhone browser wouldn't support ...

You'll need the PDAnet application (http://junefabrics.com/) (free to try, full license is $19.99). Unfortunately, Apple has apparently deemed the app to be in conflict with its App Store Terms and Conditions, so it is only available for jailbroken phones via Cydia. Here’s a quick guide:

1) Jailbreak your iPhone.

Download and install QuickPwn, an easy-to-use jailbreaking application for Windows and Mac (the latest version works with iPhone OS 3.1). Run the software and follow the onscreen instruction very carefully!

2) Install PDAnet.

QuickPwn installs an app on your phone called Cydia, which is essentially the App Store for apps that were rejected from the official App Store (or, for whatever reason, the developer chose not to release through Apple). Run Cydia, search for PDAnet and install it. Keep in mind you can only delete Cydia installed apps via Cydia’s Manage-Sources function. Now download and install the Desktop Client app (http://junefabrics.com/desktop)  on your laptop and you’re almost ready to go.

It offers the option to use your phone as a modem via adhoc wireless network or just by plugging your phone in to charge with the USB cable. (and since using 3G and wireless consumes a lot of power you will want to do this anyway), PDAnet works for iPhone, Windows Mobile, and Palm platforms.