ROFL The link is over 12 years old of course its bad.
The main forum is still there But I don't see any Dell Specific Sections.
UBUNTU 18.04.2 LTS (bionic)
Ubuntu 18.04 released in April 2018 and will be supported until April 2023.
Ubuntu 12.04's LTS period ended April 28, 2017, you can purchase an Ubuntu 12.04 Extended Security Maintenance (ESM) license. Unlike the newer versions of Ubuntu, these updates won't be free.
Ubuntu 12.04 patches will be available only through the Ubuntu Advantage support plan. Prices start at $150 per year per server and $250 per year with a minimum of 10 virtual servers. The latter plan includes work week online and phone technical support. There's also a desktop plan, which will run you $150 per year per desktop with a minimum order of 50 desktops. These updates will be delivered in a secure, private archive available only to customers on a per-node basis.
ESM subscriptions will last for at least twelve months.