From: Kamal Ahmed <kamal2222ahmed@...>
Date: 2010-05-18T20:22:49+09:00
Subject: (Net::SSH::HostKeyMismatch

Hi,

When trying to ssh login, to a host which has been reinstalled, using:

Net::SSH.start( value_hosts, USER, :password => PASS ,  :paranoid =>
false, :forward_agent => true ) do|ssh, err |




I am getting an error:

/sw/lib/ruby/gems/1.8/gems/net-ssh-1.1.1/lib/net/ssh/host-key-
verifier.rb:47:in `process_cache_miss': fingerprint da:
34:2e:a6:87:c4:c8:49:0e:a1:8e:39:fd:fc:ef:e7 does not match for <IP
address> (Net::SSH::HostKeyMismatch)


Is there a way to Ignore HostKeyMismatch ?

Net::SSH.start( value_hosts, USER, :password => PASS ,  :paranoid =>
false, :forward_agent => true ) do|ssh, err |


is not working, i.e the :paranoid => false does not seem to work.

Any hint will be appreciated.

What i am trying to accomplish is to login via ssh, even of the ssh
exchange key is no longer valid since the OS was reinstalled.


i found the following, post but even that does not work:

in order to resolve the HostKeyMismatch, use following in irb:

require 'rubygems'
require 'net/ssh'
include Net

Net::SSH.start( '10.5.30.52', 'root', :password => 'password' ,
:paranoid => false ) do|ssh|

 #puts "hello"
  end
rescue Net::SSH::HostKeyMismatch => e
  puts "remembering new key: #{e.fingerprint}"
  e.remember_host!
  retry
end


i get an error:


irb(main):001:0> Net::SSH.start( '10.5.30.52', 'root', :password =>
'password' ,  :paranoid => false ) do|ssh|
irb(main):002:1*  #puts "hello"
irb(main):003:1*   end
NameError: uninitialized constant Net
  from (irb):1
  from :0
irb(main):004:0> rescue Net::SSH::HostKeyMismatch => e
SyntaxError: compile error
(irb):4: syntax error, unexpected kRESCUE
rescue Net::SSH::HostKeyMismatch => e
      ^
(irb):4: syntax error, unexpected tASSOC
rescue Net::SSH::HostKeyMismatch => e
                                   ^
  from (irb):4
  from :0
irb(main):005:0>   puts "remembering new key: #{e.fingerprint}"
NameError: undefined local variable or method `e' for main:Object
  from (irb):5
  from :0
irb(main):006:0>   e.remember_host!
NameError: undefined local variable or method `e' for main:Object
  from (irb):6
  from :0
irb(main):007:0>   retry
LocalJumpError: retry outside of rescue clause
  from /usr/lib/ruby/1.8/irb/workspace.rb:81:in `evaluate'
  from /usr/lib/ruby/1.8/irb/context.rb:219:in `evaluate'
  from /usr/lib/ruby/1.8/irb.rb:150:in `eval_input'
  from /usr/lib/ruby/1.8/irb.rb:263:in `signal_status'
  from /usr/lib/ruby/1.8/irb.rb:147:in `eval_input'
  from /usr/lib/ruby/1.8/irb/ruby-lex.rb:244:in
`each_top_level_statement'
  from /usr/lib/ruby/1.8/irb/ruby-lex.rb:230:in `loop'
  from /usr/lib/ruby/1.8/irb/ruby-lex.rb:230:in
`each_top_level_statement'
  from /usr/lib/ruby/1.8/irb/ruby-lex.rb:229:in `catch'
  from /usr/lib/ruby/1.8/irb/ruby-lex.rb:229:in
`each_top_level_statement'
  from /usr/lib/ruby/1.8/irb.rb:146:in `eval_input'
  from /usr/lib/ruby/1.8/irb.rb:70:in `start'
  from /usr/lib/ruby/1.8/irb.rb:69:in `catch'
  from /usr/lib/ruby/1.8/irb.rb:69:in `start'
  from /usr/bin/irb:13
Maybe IRB bug!!
irb(main):008:0> end
SyntaxError: compile error
(irb):8: syntax error, unexpected kEND
  from (irb):8
  from :0
irb(main):009:0>


Thanks,
-Kamal.
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