help on addon packages

Hello,

I am running vertica on my VMware which has Centos 5.5. I wanted to add some packages to the OS as I am working on some user defined functions.
The packages which I need are
openldap-devel
glibc-devel
glibc-common
libidn-devel
openssl-devel

The Centos version is Centos 5.5 and the the rpm.
I did uname -r and found the version to be 2.6.18-194.el5, i need the rpm for 64 bit

Now the problem is
I tried installing these packages using
yum install -y glibc-devel

Error - Could not retrieve the mirrorlist
cannot find a valid base url.
IOerror <(urlopen error 110, 'connection timed out')>

yum command is not working for any of the packages. Is there any other way I can get the exact rpm and download and use it. Please help me

Do you have any repositories defined for YUM? It isn't magic. It needs to know where to look.

Perhaps you could use the OS DVD as the source of the repos. Search online for instructions for making the DVD or ISO a repository.

hello,

frankly speaking, I am very new to unix paltform. so I don't knwo whether the yum repositories are defined

Can you please help me with setting the repositry or with yum command .

I want to get the openldap-devel package for Centos 5.5

Howto Setup yum repositories to update or install package from ISO CDROM Image

CentOS 5.5 is at EOL (end of life) and is no longer maintained or updated.

If you know what you are doing, and absolutely want to remain at 5.5, go to vault.centos.org for packages.