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Top Forums Shell Programming and Scripting Setup multiple passwordless authentication Post 302386994 by Lancel0t on Thursday 14th of January 2010 08:19:31 AM
Old 01-14-2010
Quote:
Originally Posted by frans
If i understand it right, something like :

Code:
KEY="~/.ssh/id_dsa.pub"
[ -f $KEY ] || ssh-keygen -t dsa
for SERVER in $LIST_OF_SERVERS
do
    ssh-copy-id -i $KEY $USERNAME@$SERVER
done

Thanks frans.

What exactly does the ssh-copy-id command do ? I cannot find this command in my linux box which is the source machine.
How this copy-id command will work as there are no keys shared between the servers (source/destination) ?
 

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SSH-COPY-ID(1)						    BSD General Commands Manual 					    SSH-COPY-ID(1)

NAME
ssh-copy-id -- copy public keys to a remote host SYNOPSIS
ssh-copy-id [-lv] [-i keyfile] [-o option] [-p port] [user@]hostname DESCRIPTION
The ssh-copy-id utility copies public keys to a remote host's ~/.ssh/authorized_keys file (creating the file and directory, if required). The following options are available: -i file Copy the public key contained in file. This option can be specified multiple times and can be combined with the -l option. If a private key is specified and a public key is found then the public key will be used. -l Copy the keys currently held by ssh-agent(1). This is the default if the -i option was not specified. -o ssh-option Pass this option directly to ssh(1). This option can be specified multiple times. -p port Connect to the specified port on the remote host instead of the default. -v Pass -v to ssh(1). The remaining arguments are a list of remote hosts to connect to, each one optionally qualified by a user name. EXIT STATUS
The ssh-copy-id utility exits 0 on success, and >0 if an error occurs. EXAMPLES
To send a specific key to multiple hosts: $ ssh-copy-id -i /path/to/keyfile.pub user@host1 user@host2 user@host3 HISTORY
The ssh-copy-id utility was written by Eitan Adler <eadler@FreeBSD.org> as a drop-in replacement for an existing utility included with OpenSSH. BSD
February 28, 2014 BSD
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