while i trying to install apt by
yum install apt
i got the result


apt-0.5.15lorg3.94a-5.el4.rf.i386 from rpmforge has depsolving problems
--> Missing Dependency: librpmdb-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)
apt-0.5.15lorg3.94a-5.el4.rf.i386 from rpmforge has depsolving problems
--> Missing Dependency: librpm-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)
apt-0.5.15lorg3.94a-5.el4.rf.i386 from rpmforge has depsolving problems
--> Missing Dependency: librpmio-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)
Error: Missing Dependency: librpm-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)
Error: Missing Dependency: librpmio-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)
Error: Missing Dependency: librpmdb-4.3.so is needed by package apt-0.5.15lorg3.94a-5.el4.rf.i386 (rpmforge)

so anyone tell solution for this problem to clear

You need to install the package containing the file librpmdb-4.3.so I don't use Redhat so I can't tell you how to find out what package that is but I'm sure you can figure that out yourself.
ciao,
jdk

All those missing files are provided by 'rpm-devel'.

Looks like you are using Redhat EL4.
Or you are using a wrong rpmforge.repo.

The command : cat /etc/redhat-release ,,, will show your version.
( Should be told here, every time, you ask a question.)

Not automatically getting rpm-devel installed, is an indication
of not having a "redhat.repo" file. I.e. a not very useful OS.
The basic repository will be available with a paid Redhat account.

http://www.linuxquestions.org/linux/...Ask_a_Question

http://www.catb.org/~esr/faqs/smart-questions.html
..