I wrote a batch script for Windows, that will check the version of your Oxide install, compare it to the latest release of Oxide, and and download if there's a mismatch.  The ReadMe on the Github explains the simple setup/installation --
1) Update the PATH variable
2) Consider adding a line to your startup script prior to server startup: "start rustoxideupdater.bat"

My small contribution back.  Thx for all the great plugins.

https://github.com/digihax/RustOxideUpdater

not totally thrilled about it. suggesting it in a startup script for sure could introduce problems. if they are not doing a steamcmd update in the same script then why? Also why must you set/save files? not real familaur with BAT but what if this zip download fails, like many did this past wipe? no congincity, no check, no log.

Thanks but have seen many of these already.

You have to stop your server before updating oxide/steam then restart it.