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How to Use Special Keys in UNIX

UNIX operating system has some special keys. These you can use to interrupt the program processing or to resume it. The file management and keys totally different in UNIX kinds of operating systems. 

An example of a UNIX special key and its use.
Why You Need Interruption
A scenario where you made some mistake in the input command and you need to stop the further process. Then you can use the CTRL+C command. It is equal to the DELETE command.

List of UNIX Special Keys

RETURN key — The RETURN key signifies the end of a line of input. On any terminal, RETURN has a key of its own, or return may be typed by holding down the control key and typing a 'm'.Ctrl-m
Hint: Ctrl-m command is equal to RETURN key in Unix systems

DELETE: The DELETE key stops a program/command immediately, without waiting for it to finish. DELETE can be achieved equivalently with ctrl-c.
Hint: Ctrl-c Command you can use to interrupt the process.

Ctrl-s: Ctrl-s pauses the output and the program is suspended until you sta…

AWS elastic cloud EC2 top tutorial

Amazon Elastic Compute Cloud (Amazon EC2) - is a web service that provides resizable compute capacity in the cloud. It is designed to make web-scale cloud computing easier for developers. Amazon EC2’s simple web service interface allows you to obtain and configure capacity with minimal friction.

Elastic Cloud
Photo Credit: Srini

What is Elastic Cloud

Functions of EC2

  • It provides you with complete control of your computing resources and lets you run on Amazon’s proven computing environment. 
  • Amazon EC2 reduces the time required to obtain and boot new server instances to minutes, allowing you to quickly scale capacity, both up and down, as your computing requirements change. 
  • Amazon EC2 changes the economics of computing. That means, pay for the usage you did.
  • Amazon EC2 provides developers the tools to build failure resilient applications and isolate themselves from common failure scenarios.

Key Points for Interviews

Learn these basic points on EC2 for your next interview.
  • EC2 is the basic fundamental block in AWS.
  • EC2 provides remote operations of virtual machines (VM) on Amazon’s infrastructure.
  • A single VM you can call an instance. Multiple instance types present in EC2.
  • A micro instance is the only EC2 instance type that is free and is also the most underpowered instance (613MB memory). 
  • The EC2 micro instance type is the least reliably provisioned; when demand on Amazon’s infrastructure is high, the micro instance gets the lowest priority.


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