CiviCRM is an open source Constituent Relationship Management for non-profits, NGOs and advocacy organizations.
Install on Drupal
apt install drupal7-mod-civicrm
After package installation, go to http://localhost/drupal7/modules/civicrm/install/ with a browser and follow the instructions on the page. From there, you can refer to the official documentation to complete the installation and configuration of CiviCRM.
Install on Wordpress
apt install wordpress-civicrm
It is always a good idea to start by reading instructions in