src/usr.bin/ssh/ssh.1 - diff

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Diff for /src/usr.bin/ssh/ssh.1 between version 1.136 and 1.137

version 1.136, 2001/08/30 16:04:35

version 1.137, 2001/09/05 06:23:07

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option.)

.It Fl N

Do not execute a remote command.

This is useful if you just want to forward ports

This is useful for just forwarding ports

(protocol version 2 only).

.It Fl o Ar option

Can be used to give options in the format used in the configuration file.

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per-host basis in the configuration file.

.It Fl P

Use a non-privileged port for outgoing connections.

This can be used if your firewall does

This can be used if a firewall does

not permit connections from privileged ports.

Note that this option turns off

.Cm RhostsAuthentication

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If set to

.Dq yes ,

passphrase/password querying will be disabled.

This option is useful in scripts and other batch jobs where you have no

This option is useful in scripts and other batch jobs where no user

user to supply the password.

is present to supply the password.

The argument must be

.Dq yes

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real host name when looking up or saving the host key

in the host key database files.

This option is useful for tunneling ssh connections

or if you have multiple servers running on a single host.

or for multiple servers running on a single host.

.It Cm HostName

Specifies the real host name to log into.

This can be used to specify nicknames or abbreviations for hosts.

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will never automatically add host keys to the

.Pa $HOME/.ssh/known_hosts

file, and refuses to connect to hosts whose host key has changed.

This provides maximum protection against trojan horse attacks.

This provides maximum protection against trojan horse attacks,

However, it can be somewhat annoying if you don't have good

however, can be annoying when the

.Pa /etc/ssh_known_hosts

files installed and frequently

file is poorly maintained, or connections to new hosts are

connect to new hosts.

frequently made.

This option forces the user to manually

add all new hosts.

If this flag is set to

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.Dq no .

The default is

.Dq no .

Note that you need to set this option to

Note that this option must be set to

.Dq yes

if you want to use

.Cm RhostsAuthentication

and

.Cm RhostsRSAAuthentication

with older servers.

authentications are needed with older servers.

.It Cm User

Specifies the user to log in as.

This can be useful if you have a different user name on different machines.

This can be useful when a different user name is used on different machines.

This saves the trouble of

having to remember to give the user name on the command line.

.It Cm UserKnownHostsFile

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file should be added to

.Pa $HOME/.ssh/authorized_keys

on all machines

where you wish to log in using protocol version 1 RSA authentication.

where the user wishes to log in using protocol version 1 RSA authentication.

The contents of the

.Pa $HOME/.ssh/id_dsa.pub

and

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file should be added to

.Pa $HOME/.ssh/authorized_keys

on all machines

where you wish to log in using protocol version 2 DSA/RSA authentication.

where the user wishes to log in using protocol version 2 DSA/RSA authentication.

These files are not

sensitive and can (but need not) be readable by anyone.

These files are

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.Xr sshd 8

will be installed so that it requires successful RSA host

authentication before permitting \s+2.\s0rhosts authentication.

If your server machine does not have the client's host key in

If the server machine does not have the client's host key in

.Pa /etc/ssh_known_hosts ,

you can store it in

it can be stored in

.Pa $HOME/.ssh/known_hosts .

The easiest way to do this is to

connect back to the client from the server machine using ssh; this