Canonical releases Ubuntu Core 18, the latest version of its IoT-focused Linux OS

Ubuntu Core 18 is a stripped-down version of Ubuntu 18.04 LTS targeted at IoT devices

Canonical has released Ubuntu Core 18, the latest version of its Linux-based operating system for Internet of Things (IoT) devices.

Based on Ubuntu 18.04 LTS, but stripped back to the basics, it nevertheless contains a number of features that Canonical claims will appeal to device makers.

One of them is the use of digitally signed Snaps - the same technology that has brought virtualised apps that were previously limited to Windows - so that everything is effectively sandboxed, making it a lot harder for a bad actor to meddle with the functioning of a device, with digital signing ensuring that everything is what it said it is.

This also means that IoT device makers can plug-in apps from the Ubuntu and Snapcraft ecosystems, the company claims, or build exclusive Snap-based apps specific to a brand or model. But manufacturers will retain control over all aspects of updates to their devices, including scheduling.

Ubuntu Core is already enabled on a range of devices from big-name manufacturers like Dell, Intel, Qualcomm, Samsung and NXP, as well as niche device maker Rigado.

Canonical has pledged to provide security updates for ten years, although these will be "low cost", rather than free. However, because Ubuntu Core 18 is open source, it can be downloaded, played with and incorporated into devices fee-free.

By limiting the number of packages installed as standard in the Ubuntu Core 18 operating system, the number of security weakness points should be much reduced. Approved updates are distributed to all devices within 24 hours, Canonical claims.

"Dell has been working closely with Canonical over the past three years to certify Ubuntu Core on all our Edge Gateway platforms. Ubuntu Core enables our customers to build highly secure, stable IoT solutions that deliver the deep insight they need to effectively run their business," said John Dauskurdas, vice president, Global IoT/Embedded PC Sales, at Dell EMC.

He added: "We see enormous interest in customers wanting to take advantage of the built-in app store infrastructure to securely maintain and deliver new functionality at the edge."