How can i execute 2 or more commands in the same ssh session?

Question

I have the following script:

#!/usr/bin/env ruby
require \'rubygems\'
require \'net/ssh\'

Net::SSH.start(\'host1\', \'root\', :password => \"mypassword1\         


        

Answer 1

You can just give different commands separated by a new line. Something like:

@result = ssh.exec!("cd /var/example/engines/
                    pwd
                   ")
puts @result

Its probably easier (and clearer) to pass the command to a variable, then pass the variable into exec. Same principle though.

Answer 2

see if there's something analogous to the file(utils?) cd block syntax, otherwise just run the command in the same subshell, e.g. ssh.exec "cd /var/example/engines/; pwd" ?

Answer 3

ssh.exec("cd /var/example/engines/; pwd")

That will execute the cd command, then the pwd command in the new directory.

I'm not a ruby guy, but I'm going to guess there are probably more elegant solutions.

Answer 4

Im not a ruby programmer, but you could try to concatenate your commands with ; or &&

Answer 5

The current location of net-ssh-shell is changed.

What I decided to use though to call a random shell script is to scp a file to the remote machine and source it into shell. Basically doing this: File.write(script_path, script_str) gear.ssh.scp_to(script_path, File.dirname(script_path)) gear.ssh.exec(". script_path")

Answer 6

In Net::SSH, #exec & #exec! are the same, e.g. they execute a command (with the exceptions that exec! blocks other calls until it's done). The key thing to remember is that Net::SSH essentially runs every command from the user's directory when using exec/exec!. So, in your code, you are running cd /some/path from the /root directory and then pwd - again from the /root directory.

The simplest way I know how to run multiple commands in sequence is to chain them together with && (as mentioned above by other posters). So, it would look something like this:

#!/usr/bin/env ruby
require 'rubygems'
require 'net/ssh'

Net::SSH.start('host1', 'root', :password => "mypassword1") do |ssh|
    stdout = ""

    ssh.exec!( "cd /var/example/engines/ && pwd" ) do |channel, stream, data|
        stdout << data if stream == :stdout
    end
    puts stdout

    ssh.loop
end

Unfortunately, the Net::SSH shell service was removed in version 2.