I can ssh into a remote host on my aws network but using net/ssh fails in a ruby script. my gem is net-ssh(4.2.0) on Ubuntu 16.04. It doesn't prompt for a passphrase even with non_interactive => false.
error:
Authentication failed for user Net::SSH::AuthenticationFailed
Why does this code fail?
#!/usr/bin/env ruby require 'rubygems' require 'net/ssh' HOST = 'myhost' Net::SSH.start(HOST, :auth_methods => ['publickey'], :passphrase => 'mypassphrase', :non_interactive => true, :host_key => "ssh-rsa", :keys => [ '/home/markhorrocks/.ssh/id_rsa' ] ) do |session| output = session.exec!('ls') puts output end After editing my code to this I get error
(Net::SSH::HostKeyMismatch)
HOST = 'myhost' USER = 'markhorrocks' Net::SSH.start(HOST, USER, :auth_methods => ['publickey'], :passphrase => 'mypassphrase', :non_interactive => true, :host_key => "ssh-rsa", :encryption => "blowfish-cbc", :keys => [ '/home/markhorrocks/.ssh/id_rsa' ], :port => '1234', :forward_agent => true, :compression => "zlib@openssh.com" ) do |session| output = session.exec!('ls') puts output end 2 Answers
Answers 1
The keys array needs to point at your private key(s). authorized_keys is the public fingerprints for keys allowed to log in to the current host. Also you seem to have put a private key type in for host_key.
Answers 2
Here is my solution:
#!/usr/bin/env ruby require 'net/ssh' HOST = 'myhost' USER = 'markhorrocks' Net::SSH.start(HOST, USER, :auth_methods => ['publickey'], :passphrase => 'mypassphrase', :non_interactive => true, :host_key => "ssh-rsa", :encryption => "blowfish-cbc", :keys => [ '/home/markhorrocks/.ssh/id_rsa' ], :port => '1234', :forward_agent => true, :verify_host_key => false, :compression => "zlib@openssh.com" ) do |session| begin rescue Net::SSH::HostKeyMismatch => e puts "remembering new key: #{e.fingerprint}" e.remember_host! retry end output = session.exec!('ls') puts output end 
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