List all groups that have unread articles (gnus-group-list-groups). If the numeric prefix is used, this command will list only groups of level ARG and lower. By default, it only lists groups of level five (i. e., gnus-group-default-list-level) or lower (i.e., just subscribed groups).

List all groups, whether they have unread articles or not (gnus-group-list-all-groups). If the numeric prefix is used, this command will list only groups of level ARG and lower. By default, it lists groups of level seven or lower (i.e., just subscribed and unsubscribed groups).

List all unread groups on a specific level (gnus-group-list-level). If given a prefix, also list the groups with no unread articles.

List all killed groups (gnus-group-list-killed). If given a prefix argument, really list all groups that are available, but aren't currently (un)subscribed. This could entail reading the active file from the server.

List all zombie groups (gnus-group-list-zombies).

List all unread, subscribed groups with names that match a regexp (gnus-group-list-matching).

List groups that match a regexp (gnus-group-list-all-matching).

List absolutely all groups in the active file(s) of the server(s) you are connected to (gnus-group-list-active). This might very well take quite a while. It might actually be a better idea to do a A M to list all matching, and just give `.' as the thing to match on. Also note that this command may list groups that don't exist (yet)---these will be listed as if they were killed groups. Take the output with some grains of salt.

List all groups that have names that match a regexp (gnus-group-apropos).

List all groups that have names or descriptions that match a regexp (gnus-group-description-apropos).