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1 perry 1 HOSTNAME
2 !!!HOSTNAME
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 FILES
8 AUTHORS
9 ----
10 !!NAME
11
12
13 hostname - show or set the system's host name
14 dnsdomainname - show the system's DNS domain name
15 !!SYNOPSIS
16
17
18 __hostname__ [[__-v__] [[__-a__] [[__--alias__]
19 [[__-d__] [[__--domain__] [[__-f__] [[__--fqdn__]
20 [[__-i__] [[__--ip-address__] [[__--long__]
21 [[__-s__] [[__--short__] [[__-y__] [[__--yp__]
22 [[__--nis__]
23
24
25 __hostname__ [[__-v__] [[__-F filename__] [[__--file
26 filename__] [[__hostname__]
27
28
29 __hostname__ [[__-v__] [[__-h__] [[__--help__]
30 [[__-V__] [[__--version__]
31
32
33 __dnsdomainname__ [[__-v__]
34 !!DESCRIPTION
35
36
37 __Hostname__ is used to either set or display the current
38 host or domain name of the system. This name is used by many
39 of the networking programs to identify the machine. The
40 domain name is also used by NIS/YP.
41
42
43 __GET NAME__
44
45
46 When called without any arguments, the program displays the
47 current names:
48
49
50 __hostname__ will print the name of the system as
51 returned by the gethostname(2) function.
52
53
54 __dnsdomainname__ will print the domain part of the FQDN
55 (Fully Qualified Domain Name). The complete FQDN of the
56 system is returned with __hostname --fqdn__.
57
58
59 __SET NAME__
60
61
62 When called with one argument or with the __--file__
63 option, the commands set the host name or the NIS/YP domain
64 name.
65
66
67 Note, that only the super-user can change the
68 names.
69
70
71 It is not possible to set the FQDN or the DNS domain name
72 with the __dnsdomainname__ command (see __THE FQDN__
73 below).
74
75
76 The host name is usually set once at system startup in
77 ''/etc/rc.d/rc.inet1'' or ''/etc/init.d/boot''
78 (normally by reading the contents of a file which contains
79 the host name, e.g. ''/etc/hostname'').
80
81
82 __THE FQDN__
83
84
85 You can't change the FQDN (as returned by __hostname
86 --fqdn__) or the DNS domain name (as returned by
87 __dnsdomainname__) with this command. The FQDN of the
88 system is the name that the resolver(3) returns for
89 the host name.
90
91
92 Technically: The FQDN is the name gethostbyname(2)
93 returns for the host name returned by gethostname(2).
94 The DNS domain name is the part after the first
95 dot.
96
97
98 Therefore it depends on the configuration (usually in
99 ''/etc/host.conf'') how you can change it. Usually (if
100 the hosts file is parsed before DNS or NIS) you can change
101 it in ''/etc/hosts''.
102 !!OPTIONS
103
104
105 ''-a, --alias''
106
107
108 Display the alias name of the host (if used).
109
110
111 ''-d, --domain''
112
113
114 Display the name of the DNS domain. Don't use the command
115 __domainname__ to get the DNS domain name because it will
116 show the NIS domain name and not the DNS domain name. Use
117 __dnsdomainname__ instead.
118
119
120 ''-F, --file filename''
121
122
123 Read the host name from the specified file. Comments (lines
124 starting with a `#') are ignored.
125
126
127 ''-f, --fqdn, --long''
128
129
130 Display the FQDN (Fully Qualified Domain Name). A FQDN
131 consists of a short host name and the DNS domain name.
132 Unless you are using bind or NIS for host lookups you can
133 change the FQDN and the DNS domain name (which is part of
134 the FQDN) in the ''/etc/hosts'' file.
135
136
137 ''-h, --help''
138
139
140 Print a usage message and exit.
141
142
143 ''-i, --ip-address''
144
145
146 Display the IP address(es) of the host.
147
148
149 ''-s, --short''
150
151
152 Display the short host name. This is the host name cut at
153 the first dot.
154
155
156 ''-V, --version''
157
158
159 Print version information on standard output and exit
160 successfully.
161
162
163 ''-v, --verbose''
164
165
166 Be verbose and tell what's going on.
167
168
169 ''-y, --yp, --nis''
170
171
172 Display the NIS domain name. If a parameter is given (or
173 __--file name__ ) then root can also set a new NIS
174 domain.
175 !!FILES
176
177
178 __/etc/hosts__
179 !!AUTHORS
180
181
182 Peter Tobias,
183 Bernd Eckenfels,
184 ----
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