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INTRODUCTION

            The post fully deals with several parts of internet based utilities and restrictions that are mainly used in IT industry like to limit the web access for some users to a list of accepted/well known web servers and/or URLs only, Block access to some listed or blacklisted web servers and/or URLs for some users, Redirect blocked URLs to an "intelligent" CGI based info page, Etc., These all are implemented by

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Create test file using fsutil Windows

The “fsutil” in windows is much similar to the “dd” tool in linux, as both of them can be used to create test files of any size.

How to:

Execute the fsutil command in the elevated command prompt. (Command Prompt > Run as Administrator)

fsutil file createnew filename file-size-in-bytes

For example to create a file named testfile of 100 Megabytes size

C:\Windows\system32>fsutil file createnew e:\testfile 104857600

File e:\testfile is created

Thats all you are done.

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HTTP Error 500.21 - Internal Server Error Handler "PageHandlerFactory-Integrated" has a bad module "ManagedPipelineHandler" in its module list

I just deployed a brand new .Net 4 website in IIS on my machine and get this error:

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Controlling Web Access With SQUID

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The Linux Boot Process in Detail

1. When a PC is booted it starts running a BIOS program which is a memory resident program on an EEPROM integrated circuit.

BIOS – Basic Input Output of the System

EEPROM - Electrically Erasable Programmable Read-Only Memory

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Sudo Full Practical Session

Introduction

Before we proceed, it would be best to cover some basic user administration topics that will be very useful in later chapters. Adding Users

One of the most important activities in administering a Linux box is the addition of users. Here you'll find some simple examples to provide a foundation for future chapters. It is not intended to be comprehensive, but is a good memory refresher. You can use the command man useradd to get the help pages on adding users with the useradd command or the man usermod to become more familiar with modifying users with the usermod command.

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Using chkconfig to Start Daemons at Each runlevel

As stated earlier, the chkconfig command can be used to adjust which applications start at each runlevel. You can use this command with the --list switch to get a full listing of packages listed in /etc/init.d and the runlevels at which they will be on or off:

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Basic's of Networking

1. Define Network?

A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes.

2. What is a Link?

At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Link.

3. What is a node?

A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes.

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Linux / Unix Commands For Connecting To The Serial Console

Most embedded Linux / BSD systems such as routers, servers and nas devices comes with console interface (serial port with RS-232). BIOS can use this, and after boot BIOS screen I/O is redirected so that you can use the device. RS-232 is also used for communicating to headless server, where no monitor or keyboard is installed, during boot when operating system is not running yet and therefore no network connection is possible. You need to use a serial cable between your computer and embedded system or server. In this post I will cover five common utilities used for serial communication under Linux / Unix / *BSD and Mac OS X.

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How To Check and Use Serial Ports Under Linux

How do I check and configure serial ports under Linux for various purposes such as modem, connecting null modems or connect a dumb terminal?

Linux offers various tools. Linux uses ttySx for a serial port device name. For example, COM1 (DOS/Windows name) is ttyS0, COM2 is ttyS1 and so on.

Task: Display Detected System's Serial Support

Simple run dmesg command

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