This is a shiny new installation of SL4, with all errata installed via
yum update:

$ uname -a
Linux dyn-iab-163-187.dyn.columbia.edu 2.6.9-5.0.5.ELsmp #1 SMP Tue Apr 19 18:06:07 CDT 2005 x86_64 x86_64 x86_64 GNU/Linux
$

While asking myself some questions about what version of glibc was
installed I first did:

$ rpm -q glibc
glibc-2.3.4-2
glibc-2.3.4-2
$

Hmmm. So then I did:

$ rpm -qa | grep glibc
glibc-headers-2.3.4-2
glibc-kernheaders-2.4-9.1.87
glibc-common-2.3.4-2
glibc-2.3.4-2
glibc-2.3.4-2
glibc-devel-2.3.4-2
$

So _everything_ isn't duplicated. A natural question was, how many
duplicates are there?

$ rpm -qa | wc --lines
789
$ rpm -qa | sort | uniq -d | wc --lines
53
$

Can anybody tell me what's going on? Thanks.

BTW, I'm a long time Debian user, only an occasional RH user, so please
forgive me if this is a silly question. FWIW, a quick google was no help.

A related question. Does this line

glibc-kernheaders-2.4-9.1.87

hint that the glibc rpm was built on a system running kernel-2.4? If so,
should that matter to me?

Cheers,
 Pann
-- 
Pann McCuaig <[log in to unmask]>                212-854-8689
Systems Coordinator, Economics Department, Columbia University