Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
Connection closing...Socket close.
Connection closed by foreign host.
Disconnected from remote host(我的阿里雲) at
具體原因尚不清楚！
只知道去阿里雲的控制台 > 點擊實例名稱 > 左側【本實例遠程命令】
發送遠程命令
輸入命令：chmod 400 /etc/ssh/*
