synoupgrade
Upgrade a Synology DiskStation Manager (DSM) from the command-line.
TLDR
Check if upgrades are available
$ sudo synoupgrade --check
Check for patches without upgrading the DSM version
$ sudo synoupgrade --check-smallupdate
Download the latest upgrade available (use --download-smallupdate for patches)
$ sudo synoupgrade --download
Start the upgrade process
$ sudo synoupgrade --start
Upgrade to the latest version automatically
$ sudo synoupgrade --auto
Apply patches without upgrading the DSM version automatically
$ sudo synoupgrade --auto-smallupdate
Upgrade the DSM using a patch file (should be an absolute path)
$ sudo synoupgrade --patch [/path/to/file.pat]
Display help
$ synoupgrade
