1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" $FreeBSD$ 33.\" 34.Dd February 11, 1996 35.Dt HOSTS.EQUIV 5 36.Os FreeBSD 37.Sh NAME 38.Nm hosts.equiv , 39.Nm .rhosts 40.Nd trusted remote host name and user data base 41.Sh DESCRIPTION 42The 43.Nm hosts.equiv 44and 45.Nm .rhosts 46files contain information regarding 47trusted hosts and users on the network. 48For each host a single line should be present 49with the following information: 50 51simple 52.Bd -unfilled -offset indent 53hostname [username] 54.Ed 55 56or the more verbose 57.Bd -unfilled -offset indent 58[+-][hostname|@netgroup] [[+-][username|@netgroup]] 59.Ed 60.Pp 61A 62.Dq @ 63indicates a host by netgroup or user by netgroup. A single 64.Dq + 65matches all hosts or users. A host name with a leading 66.Dq - 67will reject 68all matching hosts and all their users. A user name with leading 69.Dq - 70will reject all matching users from matching hosts. 71.Pp 72Items are separated by any number of blanks and/or 73tab characters. A 74.Dq # 75indicates the beginning of 76a comment; characters up to the end of the line are 77not interpreted by routines which search the file. 78.Pp 79Host names are specified in the conventional 80.Dq \&. 81(dot) notation using the 82.Xr inet_addr 3 83routine 84from the Internet address manipulation library, 85.Xr inet 3 . 86Host names may contain any printable 87character other than a field delimiter, newline, 88or comment character. 89.Pp 90For security reasons, a user's 91.Nm .rhosts 92file will be ignored if it is not a regular file, or if it 93is not owned by the user, or 94if it is writable by anyone other than the user. 95.Sh EXAMPLES 96.Pp 97.Dl bar.com foo 98.Pp 99Trust user 100.Dq foo 101from host 102.Dq bar.com . 103.Pp 104.Dl +@allclient 105.Pp 106Trust all hosts from netgroup 107.Dq allclient . 108.Pp 109.Dl +@allclient -@dau 110.Pp 111Trust all hosts from netgroup 112.Dq allclient 113and their users 114except users from netgroup 115.Dq dau . 116.Sh FILES 117.Bl -tag -width /etc/hosts.equivxxx -compact 118.It Pa /etc/hosts.equiv 119The 120.Nm hosts.equiv 121file resides in 122.Pa /etc . 123.It Pa $HOME/.rhosts 124.Nm .rhosts 125file resides in 126.Pa $HOME . 127.El 128.Sh SEE ALSO 129.Xr rcp 1 , 130.Xr rlogin 1 , 131.Xr rsh 1 , 132.Xr gethostbyname 3 , 133.Xr inet 3 , 134.Xr innetgr 3 , 135.Xr ruserok 3 , 136.Xr yp 4 , 137.Xr ifconfig 8 , 138.Xr named 8 139.Sh BUGS 140This man page is incomplete. For more information read 141the source in 142.Pa src/lib/libc/net/rcmd.c 143or the SunOS man page. 144