Having more than one '-' hyphen is fine.
Please refer to Section 6.1 in Oracle E-Business Suite Release Notes, Release 12.2 (Doc ID 1320300.1)
Ensure the fully qualified hostname is less than 30 if hostname returns in hostname.domainname
Let me know if you need further info.
Thank you for the response.
Is host name in caps should be ok?
Yes. It is not case sensitive. But I would recommend (Not mandatory) you to keep same case in below. Everything might work just fine even if you use mixed case but why to take a chance!!
- DNS Server
- /etc/hosts, /etc/sysconfig/network
- During adcfgclone or any Application Configuration Files
I am sure you will be using 13c/12c Cloud Control and case is a bit of a head ache in EM cloud control. So it is always better to maintain same case across the Organization...