In OpenBSD utilità , designed for automatic system upgrades to a new release or snapshot of the CURRENT branch.
Sysupgrade downloads the necessary files for the upgrade, verifies them using , copies bsd.rd (a special ramdisk that operates entirely in memory, used for installation, upgrading, and system recovery) to bsd.upgrade, and initiates a system reboot. The bootloader, upon detecting bsd.upgrade, begins its automatic loading (which can be canceled by the user) and automatically updates the system to the previously loaded version.
Sysupgrade can already be used for automatic updates to the current daily snapshots of CURRENT, starting from OpenBSD release 6.6, its use is expected for upgrades from release to release. Before sysupgrade, similar actions had to be performed manually or automated independently.
For installing security updates and bug fixes on stable releases of OpenBSD, the utility is still recommended , which applies binary patches with fixes to the base system.
Fonte: opennet.ru
