These can be ordered from Dell.:Smile:
Note that Linux computers won't be seen on the main page of the Dell site, have to look for these. Not all Dell models are sold with Linux, usually select business models & will have the same warranty as the same configuration for Windows (am aware there may be differences between US & Canadian warranty & support).
At any rate, you should be able to find a Linux equipped model on the Dell site, just have to hunt around. If you're having issues finding what you want, feel free to call the Dell Support center in your area, they'll assist.
BTW, I ran Linux Mint on all of my Dell computers, both notebooks & PC's, w/out issue. Faster than Windows & more secure. Not only is the OS free, don't need as much RAM as with Windows, although as a Linux user, you likely know this.:Smile:
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.
In addition to the great response by Speedstep, one can simply buy the Dell computer of choice & can either dual boot (more complicated install) or run the Linux distro of choice solo.
Of course, if taking this route, it's best to create recovery media & create a full disk backup image before doing anything, or simply remove the installed drive supplied with the unit & replace with another HDD/SSD of choice. This will give you (or a future owner) a fresh out of the box experience. If using a SSD, be it the 2.5" version or M.2 (SATA or NVMe), follow the instructions given by the distro to enable TRIM, which is needed. While TRIM can be manually ran, it's best to have it running automatically for peak performance.
The only tool needed will be the text editor for your distro & commands. Normally there'll be one or more sites with a 'things to do' list for a distro, which will include SSD optimization.
Oh, and the advantage of creating recovery media for Windows, as well as full disk image (or removing the drive altogether & using another) will be if deciding to sell. Most users will want the original OS installed & if not, the value of the computer drops huge, unless that future owner desires to run the same distro (unlikely). When in warranty, one can also contact Dell for a reinstall DVD w/out the bloatware (and should), there's no extra cost & mine was shipped by overnight FedEx.
Just a thought that may give you the choice of your desired Linux distro while at the same time, when time to depart, you can sell it like brand new & maintain it's value. Everyone loves to boot the PC for the first time & be greeted with the fresh out of the box Dell setup & experience. This is why before booting the OS for the first time (if PC), will image the drive via docking station to an external, or if notebook, boot the backup media from a USB stick & do the same. Doesn't get any better, at some point, everyone will depart with their computer for a newer model.