synoupgrade:tldr:904f8

The command "sudo synoupgrade --download" is used in certain Linux distributions, particularly on Synology NAS devices, to download available system upgrades and updates.

Here's a breakdown of the command:

• "sudo" is used to execute the subsequent command with elevated administrative privileges. It allows the user to execute commands as a superuser or with root-level permissions.

• "synoupgrade" is the actual command being executed. It is a Synology-specific command-line tool used to manage system software updates and upgrades on Synology NAS devices.

• "--download" is an option or parameter for the "synoupgrade" command. It indicates that the command should download available system upgrades and updates, without installing them right away.

Therefore, when you run "sudo synoupgrade --download," you are instructing the system to download any available updates for the Synology NAS device, but not install them immediately. This can be handy if you want to review the updates before installation or if you have limited bandwidth and prefer to download them first for later manual installation.