2.1.2 Newsgroup Tasks

2.1.2.1 Expiration

Newsgroup article expiration is controlled by the configuration file /var/news/config/expire.ctl (see expire.ctl(4) for an extensive description). The file expire.ctl contains two types of entries; one for history retention, and one for newgroup article retention.

The format for newsgroup article retention is:

newsgroup:newsgroup-type:mindays:maxdays:purgerafter

For example, the entries

*:A:5:10:15
alt.binaries.pictures.animals.*:U:2:3:5

do two things:

• Set the default expiration parameters for all newsgroups to be "keep articles for a minimum of five days, expire articles after ten days, and purge articles after fifteen days."

• Set the expiration parameters on alt.binaries.pictures.animals.*, an unmoderated group, to be "keep articles for a minimum of two days, expire articles after three days, and purge articles after five days."

You should expire and purge articles more frequently in groups that are likely to use a lot of storage space, such as groups where binaries are posted.

After you make changes to /var/news/config/expire.ctl, you must stop then start the news server using snsnews.

2.1.2.2 Newsgroup Blocking

Blocking news groups from being fed to downstream servers is controlled by the configuration file /var/news/config/newsfeeds (see newsfeeds(4) for an extensive description).

The format for newsgroup blocking is:

server-name:sendgroup,!blockgroup1,!blockgroup2...::

For example, the entries

ME:*,!control,!junk,!local.*::
news.otherplace.com:*,!alt.binaries.*,!local.*::

do two things:

• Send all news groups except control, junk, and any group beginning local. to all servers by default.

• Send all groups except groups begining with alt.binaries. or local. to the server named news.otherplace.com.

After you make changes to /var/news/config/newsfeeds, you must stop then start the news server using snsnews.