Ruby-Expect和Pty的问题 [英] Ruby - Problems with Expect and Pty

问题描述

我正在尝试编写一个Ruby脚本，它将ssh切换到服务器，运行给定命令，并从中获取输出.这是我到目前为止的内容，主要是根据编程Ruby 本书改编而成:

I'm trying to write a Ruby script that will ssh over to a server, run a given command, and fetch the output from it. Here's what I've got so far, mostly adapted from the Programming Ruby book:

require 'pty'
require 'expect'

$expect_verbose = true
PTY.spawn("ssh root@x.y") do |reader, writer, pid|
  reader.expect(/root@x.y's password:.*/)
  writer.puts("password")
  reader.expect(/.*/)
  writer.puts("ls -l")
  reader.expect(/.*/)
  answer = reader.gets
  puts "Answer = #{answer}"
end

不幸的是，我回来的只是这个:

Unfortunately all I'm getting back is this:

Answer = .y's password:

知道我做错了什么以及如何减轻这种情况吗?

Any idea what I've done wrong and how to alleviate this?

推荐答案

为此，我建议使用net-ssh gem:sudo gem install net-ssh:

For this I recommend using the net-ssh gem: sudo gem install net-ssh: http://net-ssh.rubyforge.org/ssh/v2/api/index.html

代码有点像这样:

require 'rubygems'
require 'net/ssh'

Net::SSH.start('your-server', 'username', :password => "password") do |ssh|
  puts ssh.exec!("ls -la")
end

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