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.
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.