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Gnus Manual

2.13 Group Maintenance

b

Find bogus groups and delete them (gnus-group-check-bogus-groups).

F

Find new groups and process them (gnus-group-find-new-groups). With 1 C-u, use the ask-server method to query the server for new groups. With 2 C-u's, use most complete method possible to query the server for new groups, and subscribe the new groups as zombies.

C-c C-x

Run all expirable articles in the current group through the expiry process (if any) (gnus-group-expire-articles).

C-c M-C-x

Run all articles in all groups through the expiry process (gnus-group-expire-all-groups).