How to boot the system from USB device?

Step 1: Install Unetbootin


Click on System → Administration → Synaptic Package Manager
In that window right click on unetbootin and select mark for
installation and click on apply. Unetbootin gets installed.

Step 2: Open UNetbootin Application


Click on Applications → System Tools → Unetbootin


The UNetbootin window appears on the screen , in that choose the
distribution as desired (for BOSS select Debian Distribution
and select the other field as Testing_HdMedia)

Download vmlinuz and initrd.gz from the BOSS repository by clicking on the following link http://packages.bosslinux.in/boss/dists/savir/main/installer-i386/current/images/hd-media/gtk/

In the custom field Browse for vmlinuz in the kernel field and initrd .img in the initrd field from the specified location in your system.

Step 3: Insert a formatted USB Device
Note : To format a USB device right click on it and select format

Once it gets detected and displayed on the window and click ok now a unid folder is created inside your USB device.

Step 4: Edit your BIOS setup and save changes
Restart your system and press delete button to enter into the 'BIOS Set up' utility.

Make the desired changes in your boot menu so that the OS boots up from the USB device. Save the configuration and quit by pressing F10.

Step 5: Restart your system
Restart your machine , now your system boots from the OS image that was stored in your USB device.