Update Manager is similar in function to YUM, APT & BREW. It is consistent across cross-platform & also works in sandbox mode.
./nodectl um <command> [parameters] [options]
list - Display available/installed components
update - Retrieve new list of components & update nodectl
install - Install a component (eg pg15, spock, postgis, etc)
remove - Un-install component
upgrade - Perform an upgrade of a component
clean - Delete downloaded component files from local cache
--json # Turn on JSON output
--debug # Turn on debug logging
--silent # Less noisy
--verbose or -v # More noisy