TrueOS is a user friendly desktop Operating System based on 
FreeBSD .
Known widely for its stability and security in server environments, FreeBSD provides an excellent base on which to build a desktop operating system.
TrueOS uses a host of popular open source window managers and uses a custom-tailored application installer that puts popular applications in easy reach of users.
Features:
Rolling release based on FreeBSD-CURRENT.
Weekly package/ISO updates (or more often, as necessary).
Only one package repository. Update when you’re ready and never get left behind again.
Automatic updates can be enabled/disabled as desired.
All updates are performed in a safe manner using Boot Environments. Updates never change your live system, as the updated system is not activated or used until you reboot
Existing PC-BSD/FreeBSD users can use the non-destructive fresh installation into a new boot environment on non-encrypted ZFS pools. This mechanism preserves all user data while performing a fresh install of the operating system and all applications. Simply re-create any user accounts post-installation to access the data in their home directories
TrueOS Desktop pre-installs a pure Qt5 system based around the Lumina desktop and SysAdm.
TrueOS Server pre-installs the SysAdm service for remote system management, with remote access initially disabled.
A full repository of applications is available for installation through AppCafe.
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