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

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