Odoo is the world's easiest all-in-one management software. It includes hundreds of business apps:
CRM | e-Commerce | Accounting | Inventory | PoS | Project management | MRP | etc.
if you installed openerp in an Ubuntu or Debian distribution, do this:
apt-get search openerp-server openerp-client
if the application is installed do this:
sudo apt-get remove openerp-server openerp-client
Their is no need to uninstall, just update the software. If you want to install a new version of the server and the webserver on Ubuntu server you can follow this instruction:
In this procedure change the parameters/values to your needs.