What is the available character for the hostname? (Naming Convention)

Document ID : KB000073229
Last Modified Date : 15/03/2018
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Question:
What is the available character for the hostname?
How many characters is it possible to use for the hostname? It is about the naming convention.
Answer:
The max number of character of the hostname is 25.
  • a-z alphabet characters
  • 0-9 numeric '-' minus sign.
  • The other sign cannot be used including the '_' underscore also.
  • Not to use the numeric and the minus sign at the top of the hostname.
  • Don't use the minus sign at the end of the hostname.