Running commands over ssh with Java

2019-01-14 08:32发布

Scenerio: I'd like to run commands on remote machines from a Java program over ssh (I am using OpenSSH on my development machine). I'd also like to make the ssh connection by passing the password rather than setting up keys as I would with 'expect'.
Problem: When trying to do the 'expect' like password login the Process that is created with ProcessBuilder cannot seem to see the password prompt. When running regular non-ssh commands (e.g 'ls') I can get the streams and interact with them just fine. I am combining standard error and standard out into one stream with redirectErrorStream(true); so I am not missing it in standard error...When I run ssh with the '-v' option, I see all of the logging in the stream but I do not see the prompt. This is my first time trying to use ProcessBuilder for something like this. I know it would be easier to use Python, Perl or good ol' expect but my boss wants to utilize what we are trying to get back (remote log files and running scripts) within an existing Java program so I am kind of stuck.

Thanks in advance for the help!

标签: java ssh openssh
9条回答
可以哭但决不认输i
2楼-- · 2019-01-14 09:24

I've used the trilead ssh client with a lot of success. I have also tried jsch (another java ssh client) and tunneling to the native ssh client under linux. Trilead was by far the best.

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▲ chillily
3楼-- · 2019-01-14 09:25

You can run commands using edtFTPj/PRO, as well as performing file transfers via SFTP. It's Java.

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叛逆
4楼-- · 2019-01-14 09:27

The prompt might only be shown when ssh is connected to a TTY, which it isn't in the case of Java.

There's probably a way to supply the password on the command-line in your ssh application. That will be the way to get past the prompt.

Alternately, consider connecting directly to the host server from native Java code rather than running an external application. There's a million libraries that will do this.

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