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HOSTS.EQUIV(5) Linux Programmer's Manual HOSTS.EQUIV(5)
/etc/hosts.equiv - list of hosts and users that are granted "trusted" r command access to
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 (optionally) preceded by a plus (+)
sign. If the plus sign is used alone it allows any host to access your system. You can
expicitly 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) with-
out 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"!
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.
rhosts(5), rshd(8), rlogind(8)
Linux 1995-01-29 HOSTS.EQUIV(5)
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