To point the domain to your VPS IP, you will need to edit the zone file at your domain registrar. To edit the zone file, you will be using the default nameservers provided by your domain registrar.
Here are default examples -
- Hostname - www, record type - A address, 123.456.789.123
- Hostname - @, record type - A Address, 123.456.789.123
- Hostname - *, record type - A Address, 123.456.789.123
---replace the IP above with your VPS or Server IP
For Godaddy, please visit - http://support.godaddy.com/help/article/680/managing-dns-for-your-domain-names
For Hostgator, please visit - http://support.hostgator.com/articles/hosting-guide/lets-get-started/dns-name-servers/manage-dns-records-with-hostgatorenom
For Name.com, please visit - http://support.name.com/entries/21479548-How-do-I-create-A-records-to-point-to-the-IP-of-my-web-host-
For Network Solutions, please visit - http://www.networksolutions.com/support/accessing-dns-manager-advanced-tools/