4.Finally, create identical user accounts on each node. In our case,
we create the user DevArticle on each node in our cluster. You can
either create the identical user accounts during installation, or you
can use the adduser command as root.
better use NIS (or LDAP). So you only have to define the users once.
for a small cluster, LDAP is overkill (and NIS is, afaik, still insecure).
it's much easier to either have a single, shared NFS root
(so /etc/{passwd,shadow,group} are inherently in sync) or else
just periodically rsync these files from a master node to all others.
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