On Tue, 28 Apr 2015 10:47:32 +0530 Ashish Yadav wrote: > have you tried to rebuild the RPM database using below command, > > # rpm --rebuilddb Hi Ashish, and thank you for your reply. I contemplated doing that but felt I needed to better understand the problem, first. As it happens, I refined my search phrase a few more times and ultimately discovered the problem ... and the fix: <http://kiteplans.info/2015/01/15/solved-bug-centos-yum-rpm-broken-by-nss-softokn-3-14-3-19-el6_6-update-error-rpmts_hdrfromfdno-error-rpmdbnextiterator-header-v3-rsasha1-signature-key-id-bad/> Both servers are behaving properly now. Thanks again for your kind reply & regards, Carl