[~] # opkg
opkg must have one sub-command argument
usage: opkg [options...] sub-command [arguments...]
where sub-command is one of:

Package Manipulation:
	update			Update list of available packages
	upgrade <pkgs>		Upgrade packages
	install <pkgs>		Install package(s)
	configure <pkgs>	Configure unpacked package(s)
	remove <pkgs|regexp>	Remove package(s)
	flag <flag> <pkgs>	Flag package(s)
	 <flag>=hold|noprune|user|ok|installed|unpacked (one per invocation)

Informational Commands:
	list			List available packages
	list-installed		List installed packages
	list-upgradable		List installed and upgradable packages