How to Clear Terminal History in Kali Linux | clear_history

How to Clear Terminal History in Kali Linux | clear_history

1. open ~/.zshrc

2. add the following line

   alias clear_history='echo "" > ~/.zsh_history & exec $SHELL -l'
   

3. Save and close the file

4. Close the console or type zsh
   if you to see the result directly, this will open another zsh shell in the old one
5. Now you can clear the console by typing clear_history

PPPoE (Point-to-Point Protocol over Ethernet)

PPPoE (Point-to-Point Protocol over Ethernet) is a specification for connecting multiple computer users on an Ethernet local area network to a remote site through common customer premises equipment, which is the telephone company's term for a modem and similar devices. PPPoE can be used to have an office or building full of users share a common Digital Subscriber Line (DSL), cable modem, or wireless connection to the Internet. PPPoE combines the Point-to-Point Protocol (PPP), commonly used in dialup connections, with the Ethernet protocol, which supports multiple users in a local area network. The PPP protocol information is encapsulated within an Ethernet frame.

PPPoE has the advantage that neither the telephone company nor the Internet service provider (ISP) needs to provide any special support. Unlike dialup connections, DSL and cable modem connections are "always on." Since a number of different users are sharing the same physical connection to the remote service provider, a way is needed to keep track of which user traffic should go to and which user should be billed. PPPoE provides for each user-remote site session to learn each other's network addresses (during an initial exchange called "discovery"). Once a session is established between an individual user and the remote site (for example, an Internet service provider), the session can be monitored for billing purposes. Many apartment houses, hotels, and corporations are now providing shared Internet access over DSL lines using Ethernet and PPPoE.

Basic of Computer

Introduction

Computers have made great inroads in our everyday life and thinking. They are put to use for all sorts of applications ranging from complex calculations in the field or front line research, engineering simulations down to teaching, printing books, and recreational games. The ease with which computers can process data, store, and retrieve it painlessly have made them inevitable in office and business environments. The areas of applications of computers are confined only by limitations on human creativity and imagination. In fact, any task, that can be carried out systematically, can be performed by a computer. Therefore, it is essential for every educated person today to know about computers, its strengths, its weaknesses, and its internal structure. And that is what we are going to explain in this chapter

What is a Computer?

A computer is an electronic device that receives input, stores or processes the input as per user instructions and provides output in the desired format. Computers have become an integral part of our lives because they can accomplish easy tasks repeatedly without getting bored and complex ones repeatedly without committing errors. In this tutorial, we will discuss in detail the different parts of computer that enable it to carry out tasks efficiently and correctly. We will also discuss microprocessors, the brain of computers, which actually do all the assigned tasks.