Ruby/NetSSH try username and password only once?

Question

Is there a way to fail immediately after trying a username and password sequence with Net::SSH.start()? I am looking to test to see if credentials work then stop afterwards, here is the code that I have

output = 0
Net::SSH.start('host', 'user', :password => "pass") do |ssh|
   output = ssh.exec! 'echo "1"'
end
puts output

Casper · Accepted Answer · 2015-01-15 00:04:34Z

4

This should restrict authentication to password only, and no prompts or retries:

Net::SSH.start('host', 'user',  
               :password     => 'pass', 
               :auth_methods => [ 'password' ],
               :number_of_password_prompts => 0)

:auth_methods restricts SSH to only try those authentication methods which are listed in the array. In this case we only want to try password authentication.

:number_of_password_prompts only works with the password auth method, and if you set it to zero it will never prompt for a password, even if the authentication fails.

answered Jan 15, 2015 at 0:04

Casper

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1 Comment

Johan Lindskogen Over a year ago

I couldn't find this anywhere in the docs, and it occurs to me now that this is a ssh-config option, thank you for this!

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