Do you know how to use ssh in Centos?

Do you know how to use ssh in Centos?

Reference

• SSH原理与运用（一）：远程登录
• SSH原理与运用（二）：远程操作与端口转发
• SSH 远程执行任务
• 在本地shell脚本中ssh到远程服务器并执行命令

问题一：

INFO: 1 key(s) remain to be installed – if you are prompted now it is to install the new keys Permission denied (publickey,gssapi-keyex,gssapi-with-mic)

问题二：

cannot change directory to /home/lwk: Permission denied

问题三：

attempting to log in with the new key(s), to filter out any that are already installed

问题四：

su: cannot open session: Permission denied

问题五：

on ssh:notty There was 1 failed login attempt since the last successful login

问题六：

su: warning: cannot change directory to /home/lwk: Permission denied

问题七：

ssh-copy-id permission denied

问题八：

bash: /home/lwk/.bashrc: Permission denied

问题九：

Last failed login: Thu Jun 28 21:16:06 CST 2018 from 112.17.81.55 on ssh:notty