So I'm playing around with CentOS 7 and I'm using postfix/dovecot, OpenLDAP, MariaDB, BIND, Apache httpd, etc. My problem is that I'm confused about what names to assign to these. My current hostname is localhost.localdomain, but based on the tutorials I've seen, these various services use their own names. Would it be wise to just assign this default hostname to these services, or should I create new ones? And if I did create new ones for these, would it cause any conflicts among the services?
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