Can someone help me to update my OP from 2.1 to the latest (3.1). I need little explanation.
- Backup your database! Q- How to do this? and later do I need to restore? If yes, how?
- Backup your codebase! Q- How to do this? and later do I need to restore? If yes, how?
- Replace the old codebase with the new. Q- How to do this? You mean I need to replace the new files at /var/www/atrium/
- Follow the instructions at update.php
- You may need to manually clear you cache. (Click the button "clear cached data" on admin/settings/performance).