syspatch helps provide binary patches to OpenBSD. It brings your system up-to-date from -release to -stable. These patches do not include feature updates and should be safe to apply to production servers immediately.
$ doas syspatch
System patching can be automated by setting up a cronjob:
$ doas crontab -e
At the bottom, add this line:
~ ~ * * * /usr/sbin/syspatch
The system update will start at a random minute and hour of the day. This prevents all machines from running the exact same job at the exact same time, which would slow down a server running multiple jobs.
$ doas syspatch syspatch: Error retrieving https://cdn.openbsd.org/pub/OpenBSD/syspatch/7.1/amd64/SHA256.sig: 404 Not Found
If you see this message, then the server is missing the patches for this version of the OS. Switch mirrors by editing
$ doas syspatch syspatch: cdn.openbsd.org: no address associated with name
If you see this message, then DNS resolution is not working properly.