09-09-2007
Please. Anybody? This should not be a hard question. I am in an introductory Unix class, and this is not meant to be a difficult question.
Thanks again.
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LEARN ABOUT OSF1
hostname
hostname(5) File Formats Manual hostname(5)
NAME
hostname - Host name resolution description
DESCRIPTION
Host names are domains, where a domain is a hierarchical, dot-separated list of subdomains; for example, the machine monet, in the Berkeley
subdomain of the EDU subdomain of the Internet would be represented as follows: monet.Berkeley.EDU
Notice that there is no trailing dot.
Host names are often used with network client and server programs, which must generally translate the name to an address for use. (This
function is generally performed by the gethostbyname() function.) Host names are resolved by the Internet name resolver in the following
fashion.
If the name consists of a single component (that is, contains no dot), and if the HOSTALIASES environment variable is set to the name of a
file, that file is searched for a string matching the input host name. The file should consist of lines made up of two white-space sepa-
rated strings, the first of which is the host name alias, and the second of which is the complete host name to be substituted for that
alias. If a case-insensitive match is found between the host name to be resolved and the first field of a line in the file, the substi-
tuted name is looked up with no further processing.
If the input name ends with a trailing dot, the trailing dot is removed, and the remaining name is looked up with no further processing.
If the input name does not end with a trailing dot, it is looked up by searching through a list of domains until a match is found. The
default search list includes first the local domain, then its parent domains with at least 2 name components (longest first). For example,
in the domain CS.Berkeley.EDU, the name lithium.CChem will be checked first as lithium.CChem.CS.Berkeley.EDU and then as
lithium.CChem.Berkeley.EDU. Lithium.CChem.EDU will not be tried, as there is only one component remaining from the local domain. The search
path can be changed from the default by a system-wide configuration file.
SEE ALSO
Functions: gethostbyname(3)
Commands: named(8)
hostname(5)