How to Enable/Install apache mod_rewrite and mod_headers in ubuntu

Last week while i was working on url rewriting i face the problem. I had written the rule in .htaccess but forget to enable the mod_rewrite. Remember your .htaccess rule will not work until you enable the mod_rewrite.

How to install apache2 on ubuntu

Go to terminal (ctrl+Alt+T) and write the following command

Once apache2 installation is complete. Write the command mentioned below to enable mod_rewrite

After enable the mod_rewrite do the changes on following file

After done the changes restart the apache.

To restart apache2

Enable mod_headers in apache

Remember to restart apache 

So to restart apache2 write through terminal

Bubble Sort Program, Algorithm & their Time Complexity

Bubble Sort program, Algorithm & their time complexity.In this tutorial, We are going to learn about bubble sort algorithm and their implementation in various programming languages.

In this tutorial, we are going to cover following things

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  • What is Bubble Sort?
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What is Bubble Sort?

Bubble sort is a sorting algorithm, It works by comparing each pair of adjacent elements and switching their positions if necessary. It repeats this process until all the elements are sorted.