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Editorial Team
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Asked: 2026-06-04T19:46:57+00:00

Has anyone out there seen this error before? I haven’t been able to find

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Has anyone out there seen this error before? I haven’t been able to find any reference to SUPPORTED_TYPE in the source…

irb(main):013:0> connection = Net::SSH.start(‘host’, ‘user’, :password => ‘password’)

NameError: uninitialized constant Net::SSH::KnownHosts::SUPPORTED_TYPE
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:117:in `keys_for’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:105:in `each_line’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:105:in `keys_for’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:103:in `open’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:103:in `keys_for’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:33:in `search_in’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:33:in `map’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:33:in `search_in’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/known_hosts.rb:27:in `search_for’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/transport/algorithms.rb:237:in `prepare_preferred_algorithms!’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/transport/algorithms.rb:120:in `initialize’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/transport/session.rb:79:in `new’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh/transport/session.rb:79:in `initialize’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh.rb:186:in `new’
from /usr/lib/ruby/gems/1.8/gems/net-ssh-2.5.1/lib/net/ssh.rb:186:in `start’
from (irb):13
from /usr/lib/ruby/site_ruby/1.8/rubygems/specification.rb:1313

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1 Answer

  1. Editorial Team

    The easier solution is to use this forked version of net-ssh which fixes that issue (the next release of the official net-ssh gem should fix it as well) as described here.

    If you have that issue while deploying through capistrano (which I had today), you can install this net-ssh version from github through the Gemfile and then call cap by using bundle exec cap deploy.

    Put in the Gemfile gem 'net-ssh', :git => 'git://github.com/nessche/net-ssh.git'.

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