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Below are the links of Kali Linux's ISO images repository that you may found helpful in upgrading or downgrading Kali Linux. Kali Linux 1.0.6 Kali Linux 1.0.5 Kali Linux 1.0.4 Kali Linux 1.0.3 Kali Linux 1.0.2 Kali Linux 1.0

Before we begin, let me give you a brief introduction on Raspberry Pi. Well, a Raspberry Pi  is a low budget, small credit-card sized ARM board, that acts as a computer. This board is developed by  Raspberry Pi Foundation , UK with the intention of promoting the teaching of basic computer science in schools. The processor at the heart of the Raspberry Pi system is a Broadcom BCM2835 system-on-chip (SoC) multimedia processor. This means that the vast majority of the system’s components, including its central and graphics processing units along with the audio and communications hardware, are built onto that single component hidden beneath the 256 MB memory chip at the centre of the board. It’s not just this SoC design that makes the BCM2835 different to the processor found in your desktop or laptop, however. It also uses a different instruction set architecture (ISA), known as ARM. The ARM-based BCM2835 is the secret of how the Raspberry Pi is able to operate on just the 5V 1A...

A boot loader is a software program that runs when a computer boot. It's responsible for loading and transferring control to an operating system kernel software. The kernel, in turn, initializes the rest of the operating system.  GRUB  ( GR and U nified B oot-loader) or GNU GRUB is a very powerful multi-boot loader, which can load a wide variety of free operating systems, as well as proprietary operating systems with chain-loading. GRUB is designed to address the complexity of booting a personal computer. One of the important features in GRUB is flexibility; GRUB understands filesystems and kernel executable formats, so you can load an arbitrary operating system the way you like, without recording the physical position of your kernel on the disk. Thus you can load the kernel just by specifying its file name and the drive and partition where the kernel resides. When booting with GRUB, you can use either a command-line interface or a menu interface . Using the command-line in...