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- hosts - hostname-address database
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- The /_e_t_c/_h_o_s_t_s file contains information regarding the known hosts on the
- network. For each host a single line should be present with the
- following information:
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- +o Internet address
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- +o official hostname
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- +o aliases (optional)
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- Items are separated by any number of blanks and/or tab characters. A ####
- indicates the beginning of a comment; characters up to the end of the
- line are not interpreted by routines that search the file. For example,
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- 192.0.2.2 iris.widgets.com iris
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- This file must include entries for all of the machine's network
- interfaces, the localhost address and a few important machines on the
- local network. _i_f_c_o_n_f_i_g(1M) uses this file when assigning addresses to
- the network interfaces during system initialization.
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- By default, this file is used by _g_e_t_h_o_s_t_b_y_n_a_m_e(3N) and _g_e_t_h_o_s_t_b_y_a_d_d_r(3N)
- only when the NIS or the Berkeley Internet name server (_n_a_m_e_d(1M)) are
- not enabled. The system can be configured to use NIS, _n_a_m_e_d, and/or this
- file, as described in _r_e_s_o_l_v_e_r(4).
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- If the host is not connected to any network, the file should contain an
- entry defining the hostname as an alias for the localhost entry. For
- example, if the hostname is IRIS, the /_e_t_c/_h_o_s_t_s file should contain this
- line:
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- 127.1 localhost IRIS
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- Sites connected to the Internet should configure the system to use the
- name server. This file can be created from the official host database
- maintained at the Network Information Center (NIC), though local changes
- may be required to bring it up to date regarding unofficial aliases
- and/or unknown hosts. The host database maintained at NIC is incomplete.
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- Network addresses are specified in the conventional dot (.) notation
- using the _i_n_e_t__a_d_d_r() routine from the Internet address manipulation
- library, _i_n_e_t(3N). Legal hostnames can contain any alphanumeric
- character, the minus sign (-) and period (.). Periods are not part of
- the name but serve to separate components of a domain-style name.
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- PPPPaaaaggggeeee 1111
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- hhhhoooossssttttssss((((4444)))) hhhhoooossssttttssss((((4444))))
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- FILES
- /etc/hosts
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- ifconfig(1M), named(1M), gethostbyname(3N), resolver(4), sys_id(4),
- hostname(5).
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- PPPPaaaaggggeeee 2222
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