通过 SSH 将密码作为环境变量传递

Question

Here is what I know:

echo "password" | sudo SOME_COMMAND

The above mentioned command will log in as root directly in Bash shell and run SOME_COMMAND .

What I am trying to do:

I want to perform same task, but from a remote machine. For that I want to pass the password as a variable via an SSH command. Something like this:

ssh -o PASSWORD=password user@hostA 'echo $PASSWORD | sudo SOME_COMMAND'

(Reference: When ssh'ing, how can I set an environment variable on the server that changes from session to session? )

But it doesn't pass the $PASSWORD variable.

How can I do it?

Simple summary:

Here is what I want to do:

I want to pass a variable to remote host when I log in through SSH so I can access it in the remote host script.

Answer 1

You can use the sshpass utility to do this task. But this is not a secure way; your password is not in an encrypted format.

Reference: sshpass: Login To SSH Server / Provide SSH Password Using A Shell Script

Answer 2

You should not use sudo and ssh in one line. Here is a discussion and solution that I was answering yesterday on Super User.

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To pass a variable though a pipe you can do the following...

echo "Hello, World!" | ssh USER@HOST cat

Other methods would be passing files via scp or rsync .