hosts.equiv(4)            FILE FORMATS             hosts.equiv(4)



NAME
     hosts.equiv, .rhosts - trusted hosts by system and by user

DESCRIPTION
     The /etc/hosts.equiv file contains a list of trusted  hosts.
     When  an rlogin(1) or rsh(1) request is received from a host
     listed in this file, and when the user making the request is
     listed  in  the  /etc/passwd  file, then the remote login is
     allowed with  no  further  checking.   The  library  routine
     ruserok (see rcmd(3N)) will make this verification.  In this
     case, rlogin does not prompt for a  password,  and  commands
     submitted  through  rsh  are  executed.  Thus, a remote user
     with a local user ID is said to have equivalent access  from
     a remote host named in this file.

     The format of the hosts.equiv file consists  of  a  one-line
     entry for each host, of the form:

          hostname [username]

     The hostname field normally contains the name of  a  trusted
     host  from  which  a  remote login can be made.  However, an
     entry consisting of a single `+' indicates  that  all  known
     hosts  are  to  be trusted.  A hostname must be the official
     name as listed in the hosts(4) database. This is  the  first
     name given in the hosts database entry; hostname aliases are
     not recognized.

  The User .rhosts File
     Whenever a remote login is attempted, the remote login  dae-
     mon  checks  for a .rhosts file in the home directory of the
     user attempting to log in.  A user's file has the same  for-
     mat  as  the  hosts.equiv  file, and is used to give or deny
     access only for the specific user attempting to log in  from
     a given host.  While an entry in the hosts.equiv file allows
     remote login access to any user from the indicated host,  an
     entry  in  a  user's  .rhosts file only allows access from a
     named host to the user in whose home directory  the  .rhosts
     file  appears.   When  this file is used, permissions in the
     user's home directory should allow read and search access by
     anyone, so it may be located and read.  When a user attempts
     a remote login, his .rhosts file is, in effect, prepended to
     the  hosts.equiv  file  for  permission checking. Thus, if a
     host is specified in the user's .rhosts file,  login  access
     is allowed.

FILES
     /etc/hosts.equiv
     /etc/passwd
     ~/.rhosts
     /etc




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hosts.equiv(4)            FILE FORMATS             hosts.equiv(4)



SEE ALSO
     rlogin(1), rsh(1), rcmd(3N), hosts(4), passwd(4).





















































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