我能够成功地插入服务器。 我运行了scp命令来复制文件夹。 SCP正常后，我将无法再使用SSH。
OpenSSH_7.6p1 Ubuntu-4ubuntu0.2, OpenSSL 1.0.2n 7 Dec 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "*.*.*.*" port 22
debug2: ssh_connect_direct: needpriv 0
debug1: Connecting to *.*.*.* port 22.
debug1: connect to address *.*.*.* port 22: Connection timed out
ssh: connect to host *.*.*.* port 22: Connection timed out