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- gethostid(3), sethostid(3)
- get/set unique identifier of current host
- explain_gethostid(3)
- explain gethostid(3) errors require_index { }
- explain_gethostid_or_die(3)
- get the unique identifier of the current host
- ghostid(1), hostid(1)
- print the numeric identifier for the current host