UnixWare in 2025: still actively developed and maintained

It kind of goes by under the radar, but aside from HP-UX, Solaris, and AIX, there’s another traditional classic UNIX still in active development today: UnixWare (and its sibling, OpenServer). Owned and developed by Xinuos, UnixWare and other related code and IP was acquired by them when the much-hated SCO crashed and burned about 15 years ago or so, and they’ve been maintaining it ever since. About a year ago, Xinuos released Update Pack 1 and Maintenance Pack 1 for UnixWare 7 Definitive 2018, followed by similar update packs for OpenServer 6 later in 2024.

These update packs bring a bunch of bugfixes and performance improvements, as well as a slew of updated open source components, like new versions of SAMBA, sendmail, GCC and tons of other GNU components, OpenSSH and OpenSSL, and so, so much more, enabling a relatively modern and up-to-date build and porting environment. They can be installed through the patchck update utility, and while the Maintenance Pack is free for existing registered users, the Update Pack requires a separate license. UnixWare, while fully capable as a classic UNIX for workstations, isn’t really aimed at individuals or hobbyists (sadly), and instead focuses on existing enterprise deployments, where such licensing costs are par for the course.

UnixWare runs on x86, and can be installed both on real hardware as well as in various virtualised environments. I contacted Xinuos a few days ago for a review license, and they supplied me with one so I can experiment with and write about UnixWare. I’ve currently got it installed in a Linux kvm, where it runs quite well, including the full X11R6 CDE desktop environment and graphical administration tools. Installing updates is a breeze thanks to patchck automating the process of finding, downloading, and installing the correct ones. I intend to ask Xinuos about an optimal configuration for running UnixWare on real hardware, too.