使用ssh运行远程ruby脚本（以及传递参数）

Question

I want to connect to a remote host and run a ruby script on the remote host. Following is the code that I am using -

ssh = Net::SSH.start(host, user)
args = "some argument" //can be any data type, list, string, anything
results = conn.exec!('ruby runfile.rb args')

It's not passing args to the file in this case. I have also tried using double quotes instead of single quotes. How do I send the parameters as well?

Answer 1

• the name of the connection variable must be consistent (ssh ≠ conn).

• You need to send the content of args instead of the string "args" :

• Double quotes are needed for the #{...} syntax to work. Or use 'ruby runfile.rb ' + args if you prefer.

• Use # instead of // to comment Ruby code.

• Use .shellescape to harden against unwanted (accidental or malicious) effects in the remote shell.

This code does work:

require 'net/ssh'
require 'shellwords'

ssh = Net::SSH.start(host, user)
args = "some argument".shellescape #can be any data type, list, string, anything
results = ssh.exec!("ruby runfile.rb #{args}")
puts results