Bash

Command line interface or terminal - Introduction

When working in the command line, at the beginning of every line you will see the prompt. 

e.g.



We are going to  discuss  ubuntu@ip-172-31-29-215:~$. It's built from six elements:

your user name (e.g. ubuntu)
@
your server name (e.g. ip-172-31-29-215)
:
folder name (e.g. ~ which means your user's home directory) $

Your commands go after the $ sign.


ABOUT THE COMMAND LINE COMMANDS

In the command line, you interact with your server exclusively by typing commands. You don't have a cursor or a graphical user interface.

A few commonalities of bash commands:

  • They are usually created to do one simple thing and do that one thing very well.

  • The name of the commands are almost always the short form of the things

    they do. (e.g. pwd stands for "print working directory".)

  • Their original function can be modified with options.