HOSTS.EQUIV(5)                                      Linux Programmer's Manual                                     HOSTS.EQUIV(5)



NAME
       /etc/hosts.equiv - list of hosts and users that are granted "trusted" r command access to your system

DESCRIPTION
       The  hosts.equiv file allows or denies hosts and users to use the r-commands (e.g., rlogin, rsh or rcp) without supplying
       a password.

       The file uses the following format:

       [ + | - ] [hostname] [username]

       The hostname is the name of a host which is logically equivalent to the local host.  Users  logged  into  that  host  are
       allowed  to access like-named user accounts on the local host without supplying a password.  The hostname may be (option-
       ally) preceded by a plus (+) sign.  If the plus sign is used alone it allows any host to access  your  system.   You  can
       explicitly  deny access to a host by preceding the hostname by a minus (-) sign.  Users from that host must always supply
       a password.  For security reasons you should always use the FQDN of the hostname and not the short hostname.

       The username entry grants a specific user access to all user accounts (except root) without supplying a  password.   That
       means  the  user is NOT restricted to like-named accounts.  The username may be (optionally) preceded by a plus (+) sign.
       You can also explicitly deny access to a specific user by preceding the username with a minus (-) sign.  This  says  that
       the user is not trusted no matter what other entries for that host exist.

       Netgroups can be specified by preceding the netgroup by an @ sign.

       Be  extremely careful when using the plus (+) sign.  A simple typographical error could result in a standalone plus sign.
       A standalone plus sign is a wildcard character that means "any host"!

FILES
       /etc/hosts.equiv

NOTES
       Some systems will only honor the contents of this file when it has owner root and no write permission for  anybody  else.
       Some exceptionally paranoid systems even require that there be no other hard links to the file.

       Modern  systems  use the Pluggable Authentication Modules library (PAM).  With PAM a standalone plus sign is only consid-
       ered a wildcard character which means "any host" when the word promiscuous is added to the auth component  line  in  your
       PAM file for the particular service (e.g., rlogin).

SEE ALSO
       rhosts(5), rlogind(8), rshd(8)

COLOPHON
       This  page  is  part of release 3.25 of the Linux man-pages project.  A description of the project, and information about
       reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                                                      2003-08-24                                             HOSTS.EQUIV(5)