使用python的ssh（没有paramiko和fabric）

Question

I have a requirement to write a python script to do a ssh login from one server to the other. Unfortunately these servers do not have any internet connection and i am not able to download packages. I have written the below code using python sub process but once the ssh command is executed stdin.write dose not input the password. I have tried p.communicate also but to no avail. Please help me on this script to ssh without using paramiko or fabric.

cmd = "ssh root@17.10.14.243"
p = subprocess.Popen(cmd, stdin = subprocess.PIPE, stdout =  subprocess.PIPE, stderr =  subprocess.PIPE, bufsize = 1,shell = True)
p.stdin.write("Pass")

Answer 1

I hope that's not your real password in the question!

ssh won't read passwords from stdin , so using p.communicate or various writes sadly won't work.

If it's always these two machines, you could ensure that they both have ssh identities and then make an authorized_keys file. If you don't set a password when creating an ssh identity with ssh-keygen , and that key is in another user@host's authorized_keys file, then you'll be let in without a password:

ssh-keygen -t rsa 
ssh-copy-id user@other-host 

If ssh-copy-id doesn't exist on your system, then you want to put the contents of $HOME/.ssh/id_rsa.pub into the other host's $HOME/.ssh/authorized_keys file (which can have multiple entries)

There is also ssh-askpass , if that's installed on your system. Setting the SSH_ASKPASS environment variable to the name of a script will run that script to get the password to use, if ssh is run without an attached terminal. So if /path/to/myscript prints out mypassword , then export SSH_ASKPASS=/path/to/myscript will use mypassword when there's no terminal available.

Both options have their security concerns, so it depends on the environment you have and what you're most worried about.