One should find all information needed in the manpage, with option -h or in the README file. It might be worth going through the config file an set all options therein.

Testing ripit with no parameters should work:

user@ripstation:~$ ripit

standard settings will be used in this case. Of course: options are recommended and one can save them with option --save in a config file saved under $HOME/.ripit. Once the config file is created, no need to pass options anymore.

Example

ripit --nointeraction

But then the operator won't be able to alter the metadata from Musicbrainz or Freedb.

More examples:

ripit --outputdir ~/documents/sound/mp3 --playlist 0 --eject

Here an example using the newly added option --inputdir in case one has a bunch of sound files (in a directory) that should be converted to a different format or compression level.
Now the question is: how to add the metadata in case it is not present in the source files? In case tagged FLAC files are used or in case some "additional" files from a previous rip are present (e.g. a playlist file or a cd.toc) the metadata found will be reused. Otherwise ripit needs some hints on how to find the metadata as if the CD would be present, i.e. state a discid (either for freedb or Musicbrainz) using option --cdid. This is needed if the full metadata shall be added and must be searched on the internet. In the example below, the discid was found using Musicbrainz and pasted here to the CL:

ripit --norip --inputdir "/home/me/snd/downloads/Goldfrapp/Goldfrapp - Tales Of Us"/ -g Ambient --cdid "GLbIw4Wa85akwrC4iy1RfUQgPs8-" --mb -x 7 -i

Note that the options for output formats and directories and so on are stated in a config file to keep the example above as short as possible.