Hello -
I am trying to install the package "sharutils-4.2.1-14.i386.rpm" from Red Hat installation Disk 3. I tried to complete the installation of the package from the terminal as well as the "Konqueror" using the UI. The installation is not going through. From the terminal I am getting the following error prompt:

[root@meghna /]# redhat-install-packages /mnt/cdrom/RedHat/RPMS/sharutils-4.2.1-14.i386.rpm
error: cannot open Packages database in /var/lib/rpm
warning: rpmts_HdrFromFdno: V3 DSA signature: NOKEY, key ID db42a60e
Traceback (most recent call last):
File "/usr/share/redhat-config-packages/SinglePackageWindow.py", line 252, in ?
main_window.run()
File "/usr/share/redhat-config-packages/SinglePackageWindow.py", line 216, in run
self.do_initial_setup ()
File "/usr/share/redhat-config-packages/SinglePackageWindow.py", line 145, in do_initial_setup
h = ts.hdrFromFdno(fd)
rpm.error: public key not available

Can anyone please help me out in resolving this issue?
(I have very less experience with Red Hat or any variants of Linux)

Thanks -
Shantanu.