How to upgrade my db file?

Hi,

I use squidGuard to block some URLs. From http://info.ost.eltele.no/
freeware/squidGuard/configuration.shtml#Configuration_file,
I know how to upgrade my file.db with file.diff.

In my DB directory:

-rw-rw-r-- 1 squid squid 723 Jul 23 19:06 README
-rw-r----- 1 squid squid 229294 Jan 16 22:33 domains
-rw-r----- 1 squid squid 229294 Jan 16 22:38 domains.db
-rw-rw-r-- 1 squid squid 20 Jan 16 22:20 domains.diff
-rw-r----- 1 squid squid 444 Jan 4 1999 expressions
-rw-r----- 1 squid squid 893314 Jan 13 20:10 urls

domains.db is a copy of domains.

My domains.diff like:

+linux.ustc.edu.cn

But when I run "squidGuard -u". It report error:

sg: unrecognized file type

Who can tell me the reason, and how to use squidGuard -u ?

Now , I have to add new lines to domains file.:-<

 --
  Hai Xu, CCNA, HAM:BG6DJ
  Network Center, Univ. of Sci. & Tech. of China
  Hefei, Anhui 230026
  P.R. China
  Tel: +86-551-360-3400
Received on Sun Jan 16 2000 - 08:00:28 MST