使用Python（sftp）更改远程Linux系统的密码

Question

It seems very simple, but I searched multiple resources but could not find an answer on how to change a remote Linux system password using Python and with SFTP.

def changepwd():
    sftp_client = ssh.open_sftp()
    #change password of root on remote server

Are there any built-in modules that I can use to change the password? Thanks in advance.

---

Thanks for all you help. This is how I changed the passwd for 'root'.

ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(hostname, username=Name, password=Pwd)
print "Connection succesfully established ...with %s " % hostname

stdin, stdout, stderr = ssh.exec_command('echo -e "newpasswd\newPasswd" | passwd')
print "stderr: ", stderr.readlines()
print "pwd: ", stdout.readlines()
ssh.close()

Answer 1

You cannot change password with SFTP protocol.

You can change password with SSH protocol. But the SSH protocol API for changing a password is not support by the most widespread SSH server – OpenSSH. Nor it is supported by the most widespread Python SSH library – Paramiko. So this most likely won't work for you anyway.

So in the end the only viable option is to execute a relevant shell command ( passwd or chpasswd ) via SSH (eg using Paramiko).