1HTABLE(8) System Manager's Manual HTABLE(8)
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6 htable - convert NIC standard format host tables
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9 /etc/htable [ -c connected-nets ] [ -l local-nets ] file
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12 Htable is used to convert host files in the format specified in Inter‐
13 net RFC 810 to the format used by the network library routines. Three
14 files are created as a result of running htable: hosts, networks, and
15 gateways. The hosts file may be used by the gethostbyname(3N) routines
16 in mapping host names to addresses if the nameserver, named(8), is not
17 used. The networks file is used by the getnetent(3N) routines in map‐
18 ping network names to numbers. The gateways file may be used by the
19 routing daemon in identifying ``passive'' Internet gateways; see
20 routed(8C) for an explanation.
21 If any of the files localhosts, localnetworks, or localgateways are
23 present in the current directory, the file's contents is prepended to
24 the output file. Of these, only the gateways file is interpreted.
25 This allows sites to maintain local aliases and entries which are not
26 normally present in the master database. Only one gateway to each net‐
27 work will be placed in the gateways file; a gateway listed in the
28 localgateways file will override any in the input file.
29 If the gateways file is to be used, a list of networks to which the
31 host is directly connected is specified with the -c flag. The net‐
32 works, separated by commas, may be given by name or in Internet-stan‐
33 dard dot notation, e.g. -c arpanet,128.32,local-ether-net. Htable
34 only includes gateways which are directly connected to one of the net‐
35 works specified, or which can be reached from another gateway on a con‐
36 nected net.
37 If the -l option is given with a list of networks (in the same format
39 as for -c), these networks will be treated as ``local,'' and informa‐
40 tion about hosts on local networks is taken only from the localhosts
41 file. Entries for local hosts from the main database will be omitted.
42 This allows the localhosts file to completely override any entries in
43 the input file.
44 Htable is best used in conjunction with the gettable(8C) program which
46 retrieves the NIC database from a host.
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49 intro(3N), gettable(8C), named(8)
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52 If the name-domain system provided network name mapping well as host
53 name mapping, htable would no longer be needed.
544.2 Berkeley Distribution May 22, 1986 HTABLE(8)