# su news -c "/usr/lib/news/bin/ctl/checkgroups" <
/tmp/check
This will update your newsgroups file, adding the groups listed in localgroups. The old newsgroups file will be moved to newsgroups.bac. Note that posting the message locally will rarely work, because inews refuses to accept that large an article.
If C-News finds mismatches between the checkgroups list and the active file, it will produce a list of commands that would bring your site up to date, and mail it to the news administrator. The output typically looks like this:
From news Sun Jan 30 16:18:11 1994
Date: Sun, 30 Jan 94 16:18 MET
From: news (News Subsystem)
To: usenet
Subject: Problems with your active file
The following newsgroups are not valid and should be removed.
alt.ascii-art
bionet.molbio.gene-org
comp.windows.x.intrisics
de.answers
You can do this by executing the commands:
/usr/lib/news/bin/maint/delgroup alt.ascii-art
/usr/lib/news/bin/maint/delgroup bionet.molbio.gene-org
/usr/lib/news/bin/maint/delgroup comp.windows.x.intrisics
/usr/lib/news/bin/maint/delgroup de.answers
The following newsgroups were missing.
comp.binaries.cbm
comp.databases.rdb
comp.os.geos
comp.os.qnx
comp.unix.user-friendly
misc.legal.moderated
news.newsites
soc.culture.scientists
talk.politics.crypto
talk.politics.tibet
When you receive a message like this from your news system, don't believe it blindly. Depending on who sent the checkgroups message, it may lack a few groups or even entire hierarchies; so you should be careful about removing any groups. If you find groups are listed as missing that you want to carry at your site, you have to add them using the addgroup script. Save the list of missing groups to a file and feed it to the following little script:
#!/bin/sh
cd /usr/lib/news
while read group; do
if grep -si "^$group[[:space:]].*moderated" newsgroup; then
mod=m
else
mod=y
fi
/usr/lib/news/bin/maint/addgroup $group $mod
done