[root@server01 ~]# rpm -i ruby-ldap-0.9.7-1.i386.rpm 
warning: ruby-ldap-0.9.7-1.i386.rpm: V3 DSA signature: NOKEY, key ID bfbaf0e8
error: Failed dependencies:
        /usr/bin/ruby is needed by ruby-ldap-0.9.7-1.i386
        libcrypto.so.5 is needed by ruby-ldap-0.9.7-1.i386
        liblber-2.3.so.0 is needed by ruby-ldap-0.9.7-1.i386
        libldap-2.3.so.0 is needed by ruby-ldap-0.9.7-1.i386
        libldap_r-2.3.so.0 is needed by ruby-ldap-0.9.7-1.i386
        libruby.so.1.8 is needed by ruby-ldap-0.9.7-1.i386
        libssl.so.5 is needed by ruby-ldap-0.9.7-1.i386
        openldap >= 2.3.0 is needed by ruby-ldap-0.9.7-1.i386
        ruby is needed by ruby-ldap-0.9.7-1.i386
    Suggested resolutions:
        /home/buildcentos/CENTOS/en/4.0/x86_64/CentOS/RPMS/ruby-1.8.1-7.EL4.6.x86_64.rpm