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hosts(5) [freebsd man page]

HOSTS(5)						      BSD File Formats Manual							  HOSTS(5)

NAME
hosts -- host name data base DESCRIPTION
The hosts file contains information regarding the known hosts on the network. It can be used in conjunction with DNS, and the NIS maps `hosts.byaddr' and `hosts.byname', as controlled by nsswitch.conf(5). For each host a single line should be present with the following information: Internet address official host name aliases 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 which search the file. This file provides a backup used when the name server is not running. For the name server, it is suggested that only a few addresses be included in this file. These include addresses for the local interfaces that ifconfig(8) needs at boot time and a few machines on the local network. This file may be created from the official host data base maintained at the Network Information Control Center (NIC), though local changes may be required to bring it up to date regarding unofficial aliases and/or unknown hosts. As the data base maintained at NIC is incomplete, use of the name server is recommended for sites on the DARPA Internet. Network addresses are specified in the conventional ``.'' (dot) notation using the inet_addr(3) routine from the Internet address manipula- tion library, inet(3). Host names may contain any printable character other than a field delimiter, newline, or comment character. FILES
/etc/hosts The hosts file resides in /etc. SEE ALSO
gethostbyname(3), nsswitch.conf(5), ifconfig(8) Name Server Operations Guide for BIND. HISTORY
The hosts file format appeared in 4.2BSD. BSD
December 25, 2013 BSD

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HOSTS.EQUIV(5)						      BSD File Formats Manual						    HOSTS.EQUIV(5)

NAME
hosts.equiv, .rhosts -- trusted remote host and user name data base DESCRIPTION
The hosts.equiv and .rhosts files contain information regarding trusted hosts and users on the network. For each host a single line should be present with the following information: simple hostname [username] or the more verbose [+-][hostname|@netgroup] [[+-][username|@netgroup]] A ``@'' indicates a host by netgroup or user by netgroup. A single ``+'' matches all hosts or users. A host name with a leading ``-'' will reject all matching hosts and all their users. A user name with leading ``-'' will reject all matching users from matching hosts. 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 which search the file. Host names are specified in the conventional Internet DNS dotted-domains ``.'' (dot) notation using the inet_addr(3) routine from the Inter- net address manipulation library, inet(3). Host names may contain any printable character other than a field delimiter, newline, or comment character. For security reasons, a user's .rhosts file will be ignored if it is not a regular file, or if it is not owned by the user, or if it is writable by anyone other than the user. FILES
/etc/hosts.equiv The hosts.equiv file resides in /etc. $HOME/.rhosts .rhosts file resides in $HOME. EXAMPLES
bar.com foo Trust user ``foo'' from host ``bar.com''. +@allclient Trust all hosts from netgroup ``allclient''. +@allclient -@dau Trust all hosts from netgroup ``allclient'' and their users except users from netgroup ``dau''. SEE ALSO
rcp(1), rlogin(1), rsh(1), gethostbyname(3), inet(3), innetgr(3), ruserok(3), netgroup(5), ifconfig(8), yp(8) BUGS
This manual page is incomplete. For more information read the source in src/lib/libc/net/rcmd.c or the SunOS manual page. BSD
December 25, 2013 BSD

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