使用scp之类的东西但是当我已经登录时

Question

我想在登录后通过ssh复制一个文件。scp所做的就是通过登录、密码、路径来复制文件。我想要的是，当我“在里面”时，能够做同样的事情，最好不用提供登录和密码：

$ ssh root@123.123.243.63
root's password:

Welcome to .....
Last login: ....
root@folder1:~# // How do I download (or upload) the files when I'm here?

Answer 1

如果设置了控制文件，则可以重用现有的连接身份验证。来自man ssh_config：

 ControlMaster
         Enables the sharing of multiple sessions over a single network
         connection.  When set to “yes”, ssh(1) will listen for
         connections on a control socket specified using the ControlPath
         argument.  Additional sessions can connect to this socket using
         the same ControlPath with ControlMaster set to “no” (the
         default). ...
         Two additional options allow for opportunistic multiplexing: try
         to use a master connection but fall back to creating a new one if
         one does not already exist.  These options are: “auto” and
         “autoask”.  The latter requires confirmation like the “ask”
         option.

因此，如果使用选项-o ControlMaster=auto -o ControlPath=/tmp/ssh-%h-%r进行连接，则第一个连接可以用于scp。这可以在您的~/.ssh/config中设置：

Host some-host
  ControlMaster auto
  ControlPath=/tmp/ssh-%h-%r