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HOSTS.EQUIV (5) | | Unix Manual Pages | :man


hosts.equiv, .rhosts - trusted remote host and user name data base


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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:

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 "." (dot) notation using the inet_addr(3) routine from the Internet 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.


/etc/hosts.equiv The hosts.equiv file resides in /etc.
$HOME/.rhosts .rhosts file resides in $HOME.


bar.com foo

Trust user "foo" from host "bar.com".


Trust all hosts from netgroup "allclient".

+@allclient -@dau

Trust all hosts from netgroup "allclient" and their users except users from netgroup "dau".


rcp(1), rlogin(1), rsh(1), gethostbyname(3), inet(3), innetgr(3), ruserok(3), ifconfig(8), named(8), yp(8)


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