Python3：通过pexpect实现ssh

Question

我是新手，通过python使用pexpect模块完整的ssh函数。如你所见，请告诉我ssh命令背后的“-l”用法是什么？似乎-l不是使用ssh的方法。

#!/usr/bin/env python
import pexpect
import sys

host="xxx"
user="xxx"
password="xxxx"
command="ls -l"
child = pexpect.spawn('ssh -l %s %s %s'%(user, host, command)) # what's the usage of "-l" behind ssh? if I remove "-l" , it will come an error.
child.expect('password:')
child.sendline(password)
child.expect(pexpect.EOF)

Answer 1

根据man ssh：

-l login_name Specifies the user to log in as on the remote machine.  This also may be specified on a per-host basis in the configuration file.

在您的情况下，您可以避免使用-l：

child = pexpect.spawn('ssh %s@%s %s'%(user, host, command))