This [teacup] subcommand is used to produce lists of packages, optionally restricting to just those that aren't installed or are in need of updates.

The command "teacup list --at-default" will list what is installed locally, without reference to the network.
    teacup list ?--http-proxy HOST:PORT? ?-v? ?--timeout SEC? ?--at-default? ?--at DIR? 
    ?--as profile|table|csv? ?--only uninstalled|unknown|newer|update? ?--is ENTITY? ?NAME ?VERSION??

Lists all instances of the NAMEd package found in the
configured set of archives. The output can be restricted to a
specific VERSION of the package, or forced to contain all
packages (by specifying neither NAME nor VERSION).

If a NAME was specified, but nothing was found the command
does a case-insensitive substring search for candidate names
and then re-does the operation for all found candidates. This
fixes typos like 'bwidget' instead of 'BWidget', but also
means that 'zlib' will find 'zlibtcl', etc.


        --only uninstalled|newer|unknown|update

            Limiter option for output.

            unknown, uninstalled

                Of the installable entities known to the registered
                archives, show only those not installed in the
                installation repository.

            update, newer

                Of the installable entities known to the registered
                archives, show only those which are installed in the
                installation repository and have a newer version in
                archives

        The other options are standard options, explanations can be
        had via

            teacup help options




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