Can rpm packages be over installed?
 

I have two rpm packages:
1)ns-2.0.0.0-0.dl.web.rpm.bin
2)ns-2.0.0.0-0.dl.rcd.rpm.bin
If I install ns-2.0.0.0-0.dl.web.rpm.bin it installs succesfully and after that if I install this ns-2.0.0.0-0.dl.rcd.rpm.bin this also installs successfuly
When I do a rpm -qa | grep ns
It shows both the packages
I want to have an over installation . How do I prevent the existence of both the packages?

Do you mean you want to reinstall the packages?


Like it sez in the Metallica lyrics:
Not dead which eternal lie
Stranger eons death may die

Drain you of your sanity
Uninstall The Thing That Should Not Be.

No I donot want to reinstall. I install one package and without uninstalling the !st package I want to install the 2nd one. At a time I want only the existence of a single package.

You mean, that when you install second package first one should be uninstalled ?

In this case Obsolete: tag should help

What is the reason for this? If the two rpm contains different files you have to keep them both. If they contain the same files, just install the second one, since it will overwrite the first one that will result completely unnecessary.

maybe you mean .
rpm -Uvh and not rpm -ivh

on this way you will install 2 versions of the same package

How to use the Obsolete tag?I am new to making rpm packages.Can anyone elaborate with an example?

In the spec file of the package foo put
In the spec file for package bar put
Somewhere I saw recommendation to use it as
and

But I don't remember reason for using Conflict tag