Ever wondered why command line is still in use even when there are hundreds of human-friendly GUI’s and tools available? Everyone in the programmer's world would agree on one thing: Command Line is far more powerful than any GUI. It provides a richer experience in terms of speed and expressiveness.

For beginners, it might be hard to appreciate its beauty and a little challenging to shift from an interactive interface to a blank box with just a “$” sign showing that keeps prompting the user to enter complex commands if you want to get something done. This is why we felt the need to build a course which could help the user overcome his/her fear of using the terminal (we have all been there).

The objective of this course is to help you get a strong grip over Linux, mainly focusing on BASH. You will be covering both, the theoretical and practical sides. First, you will learn a bunch of concepts necessary to understand things and then study some nifty commands to get useful things done out of them.

Bash for Programmers

> We can use `head` and `tail` to view beginning and ending contents of file.
## head:
### Definition:
`head`, by default, prints the first 10 lines of each file to standard output. It reads the first few lines of any text given to it as an input and writes them on the display screen.
### Syntax:
```shell
head [options] [file(s)]
```
### Options:
| **Option** | **Description** |
| --- | --- |
| -n | It can be used followed by an integer representing the number of lines to be displayed. |
| -c | This option can be used followed by the number of bytes desired.|
| -q (quiet) | Never print headers identifying file names. |
| -v (verbose) | Always print headers identifying file names. |
### Example:
- To display first **15** lines from a file: 
```shell
head -n 15 myFile.txt
```

> We can use `head` and `tail` to view beginning and ending contents of file.
# head:
## Definition:
`head`, by default, prints the first 10 lines of each file to standard output. It reads the first few lines of any text given to it as an input and writes them on the display screen.
## Syntax:
```shell
head [options] [file(s)]
```
## Options:
| **Option** | **Description** |
| --- | --- |
| -n | It can be used followed by an integer representing the number of lines to be displayed. |
| -c | This option can be used followed by the number of bytes desired.|
| -q (quiet) | Never print headers identifying file names. |
| -v (verbose) | Always print headers identifying file names. |
## Example:
- To display first **15** lines from a file: 
```shell
head -n 15 myFile.txt
```

Learn the commands to display the beginning and ending contents of any file.

Introduction to Bash

Navigation Commands

File Manipulation Commands

Permission Commands

Filtering & Searching Commands

System & Process Commands

Variables and Environment

An Overview of Commands

Viewing Beginning and Ending Contents of Files

head:

Definition:

Syntax:

Options:

Example:

Option	Description
-n	It can be used followed by an integer representing the number of lines to be displayed.
-c	This option can be used followed by the number of bytes desired.
-q (quiet)	Never print headers identifying file names.
-v (verbose)	Always print headers identifying file names.