Generate dummy content in drupal via drush

Prerequisite :

1. Installed drupal.
2. Installed drush.
3. Having internet connectivity

How to generate content:
Go to drupal root folder

 cd /var/www/drupal7 

Download devel module

 drush dl devel -y 

Enable devel module

 drush en devel -y

Enable devel generate module

 drush en devel_generate -y

Create 20 dummy nodes

drush genc 20 

Create 10 nodes and 20 comments

 drush genc 10 20

Create 30 new nodes and deleting old ones

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