Author Archives: nigel borrington

Linux Shell- command history

NB : Please note that this post follows on from Linux Shell command tricks The second of the tools available for the command line interface to a Linux shell is command History, Just like Command and file completion this set … Continue reading

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Linux Shell command tricks – Command completion

The power of the command line in Linux Distributions is still very much at the forefront, many admin task can simply be performed much more efficiently this way. This faster command entry speed, for admin tasks is true even by … Continue reading

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Linux OS and GPIO managment

Please note that this post follows on from : GPIO Part 1 :ARM Development boards and their low-level coding Data-sheets This post is part 2 of A Look at how development boards such as the Raspberry PI allow a developer … Continue reading

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Looking at shells, internal and External commands

This Study area follows on from this Post , Using Linux Shells Each of the available command shells in Linux has two primary types of commands, Internal or External. Internal By saying a command is Internal, these commands are fully … Continue reading

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Using Linux Shells, Command entry and Terminal emulators.

Please note that this post follows on from : The Linux Shell Operating systems such as Linux and Microsoft windows owe their current existence to much earlier versions of themselves with ASCII-code Text based command lines as their only interface … Continue reading

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I/O Addresses and I/O memory

Please note that this post follows on from : IRQ’s and Interrupts I/O Addresses and I/O memory relate to bi-directional Communications between (CPU/Computer to devices ) as opposed to IRQ’s/Interrupt’s which are one way (device to CPU/Computer) communications. Communication via … Continue reading

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Device IRQ’s (interrupt requests) a Definition.

Definition of : IRQ (interrupt request) An IRQ (interrupt request) value is an assigned location in memory where the computer can expect a particular device to interrupt it when the device sends the computer signals about its operation. Note that … Continue reading

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Introduction to the new “Study Notes section”

Introduction of the Study Notes section I have been feeling the need on my blog to create a general study notes section, so today this is what I am doing. I find that there are general IT related topics that … Continue reading

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ARM Development boards and their low-level coding Data-sheets

Low level Arm Processor Development Starting to get to grips with coding on any computer system is not a simple task. At the very start you need to select an appropriate coding language and then choose the best possible learning … Continue reading

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Raspberry Pi light sensor controlled LED lamp Project

Project Plans and notes I am currently working on a background PI project to replace the on/off switch on a desktop LED lamp that I needed to repair. The Lamp is made by electronics company called “AM Tech” and cost … Continue reading

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