SSH: Avoiding password prompt with rsa key generation Post: 302220737

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Special Forums UNIX and Linux Applications SSH: Avoiding password prompt with rsa key generation Post 302220737 by same1290 on Friday 1st of August 2008 12:39:11 PM

08-01-2008

Registered User

Checked ~/.ssh/id_rsa.pub and .ssh/authorized_keys

Ok I started over: I ssh'ed into the remote machine, bricklayer, and deleted .ssh/authorized_keys. then exited to the local machine, meggi, and deleted id_rsa and id_rsa.pub. Then regenerated the key. Here's the whole sequence from scratch:

$ rm .ssh/authorized_keys
$ exit
logout
Connection to bricklayer.remotehost closed.
>
> rm .ssh/id_rsa*
>
> ls .ssh/
known_hosts
> uname -n
meggi
> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/homes/12/same/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /homes/12/same/.ssh/id_rsa.
Your public key has been saved in /homes/12/same/.ssh/id_rsa.pub.
The key fingerprint is:
ff:1b:fa:c6:80:33:15:ae:9e:57:39:94:38:20:67:c1 same@meggi
>
> ssh-copy-id -i ~/.ssh/id_rsa.pub test3@bricklayer.remotehost
test3@bricklayer.remotehost's password:
Now try logging into the machine, with "ssh 'test3@bricklayer.remotehost'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

> cat .ssh/id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2E...WUXfilLCNywEmX0= same@meggi
>
>
> ssh test3@bricklayer.remotehost
test3@bricklayer.remotehost's password:
Last login: Fri Aug 1 12:13:58 2008 from meggi.localhost
$
$ uname -n
bricklayer
$ cat .ssh/authorized_keys
ssh-rsa AAAAB3NzaC1yc2E...WUXfilLCNywEmX0= same@meggi
$

So the two files ~/.ssh/id_rsa.pub and .ssh/authorized_keys are identical, I diff'ed them. Is that the way it should be? Also does the local machine's ~/.ssh/known_hosts file play a role in this?

Thanks,
Sam

same1290

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LEARN ABOUT FREEBSD

ssh-copy-id

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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