rpm installation problem
 

While running
#rpm -ihv cman-2.0.115-109.el5.x86_64.rpm
warning: cman-2.0.115-109.el5.x86_64.rpm: Header V3 DSA signature: NOKEY, key ID 37017186
error: Failed dependencies:
perl(Net::Telnet) is needed by cman-2.0.115-109.el5.x86_64
perl(XML::LibXML) is needed by cman-2.0.115-109.el5.x86_64

I am a self learner and I am having no idea how to resolve the issue of last two lines .
Even I have no idea what is meant by perl(net::telnet) , perl(XML:LibXML) can any body let me know about this issue
regards
vipan sharma

It means you can't install the cman package without having installed the two perl packages mentioned. You can get them here.
jdk

RHEL 5.x ?

Use the "Redhat CentOS" repositories, i.e. migrate the OS to CentOS:
http://wiki.centos.org/HowTos/MigrationGuide

Then you can do : # yum install cman
.. and get the dependencies automatically.