4.3BSD - /usr/man/cat1/hostid.0

HOSTID(1)                                                            HOSTID(1)


NAME
       hostid - set or print identifier of current host system

SYNOPSIS
       hostid [ identifier ]

DESCRIPTION
       The  hostid  command  prints the identifier of the current host in hex‐
       adecimal.  This numeric value is expected to be unique across all hosts
       and is commonly set to the host’s Internet address.  The super-user can
       set the hostid by giving a hexadecimal argument or the  hostname;  this
       is usually done in the startup script /etc/rc.local.

SEE ALSO
       gethostid(2), sethostid(2)


4.2 Berkeley Distribution         May 5, 1986                        HOSTID(1)