Today, I made an upgrade of Bind DNS package by way of "yum install bind". Afterwards, when I restarted the service using "service named restart", bind stopped running unexpectedly.
The cause of the failure was that yum only upgrade bind to bind-9.5.2-1.fc10.i386. However, bind-chroot, bind-libs and bind-utils stayed on the older version. This is a flaw network administrators never expect to see.
I had to do a "yum -y update bind bind-libs bind-utils bind-chroot". Afterwards, everything was rescued to normal.
I am sure similar incident of upgrade failure will come back to me at a later time.
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