expires entries from the news overview database.
It reads a list of pathnames (relative to the spool directory,
from the specified
or standard input if none are specified.
(A file name of ``-'' may be used to specify the standard input.)
It then removes any mention of those articles from the appropriate overview
If the ``-z'' flag is used, then the input is assumed to be sorted such
that all entries for a newsgroup appear together so that it can be purged
This flag can be useful when used with the sorted output of
If the ``-s'' flag is used, then
will read the spool directory for all groups mentioned in the
file, and remove the overview entries of any articles that do not appear
in the directory.
To specify an alternate file, use the ``-f'' flag; a name
of ``-'' is
taken to mean the standard input.
The ``-a'' flag reads the spool directory and adds any missing
It will create files if necessary.
This can be used to initialize a database, or to sync up a overview
database that may be lacking articles due to a crash.
should be running, to ensure that any incoming articles get included.
Using this flag implies the ``-s'' flag;
the ``-f'' flag may be used
to add only a subset of the newsgroups.
To see a list of the entries that would be added or deleted, use
To perform no real updates, use the ``-n'' flag.
The ``-D'' flag can be used to specify where the databases are stored.
The default directory is
The ``-O'' flag may be used to specify an alternate location for the
file; this is normally only useful for debugging.