Online to see a lot of Use USB stick installation tutorial, Qi said. Practice is the standard of testing truth, Try it!
To download the system image:
Http://cdimage.debian.org/cdimage/release/current/amd64/iso-cd/debian-7.7.0-amd64-xfce-CD-1.iso
Download the boot Image:
Http://ftp.nl.debian.org/debian/dists/wheezy/main/installer-amd64/current/images/hd-media/boot.img.gz
Unzip to get a boot.img file
Use the UltraISO software steps below:
1, open the boot.img after decompression;
2, insert a USB stick;
3. Click the menu "Start"-"Write to hard disk image"
4, select the inserted USB drive, write: USB-HDD, then click "Write". (Note that all data on the USB drive will be deleted!) )
5. Copy the downloaded system image Debian-7.7.0-amd64-xfce-cd-1.iso to the root directory of the USB stick.
This way the computer will see the boot menu when it boots from the USB stick. The next step is the installation process.
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USB Stick Installation Debian 7