[Linux] SSH登陆错误 (Aliyun实战错误QA)

柔光的暖阳◎ 2022-11-11 14:56 143阅读 0赞

### 前言 ###

重新切回`SSH`使用. 稍微有一点不太习惯. 在此记录一下`SSH`过程中遇到的相关异常.

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### 异常列表 ###

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##### 登陆异常 (Aliyun) #####

localhost:~ sean$ ssh 112.xxx.xxx.xxx
    The authenticity of host '112.xxx.xxx.xxx (112.xxx.xxx.xxx)' can't be established.
    ECDSA key fingerprint is SHA256:ABCDEESSucFXn81uEM3qbr0DDFSSYjDHc.
    Are you sure you want to continue connecting (yes/no)? yes
    Warning: Permanently added '112.xxx.xxx.xxx' (ECDSA) to the list of known hosts.
    sean@112.xxx.xxx.xxx: Permission denied (publickey).

一般个人的`.ssh`目录下面会存储3个文件. 将其中的`known_hosts`删除即可. 或者进入文件内部, 删除你历史记录的服务器的地址.

localhost:~ sean$ cd .ssh/
    localhost:.ssh sean$ ls
    authorized_keys	id_rsa		id_rsa.pub	known_hosts
    localhost:.ssh sean$ pwd
    /Users/sean/.ssh
    localhost:.ssh sean$ rmm -rf known_hosts
    -bash: rmm: command not found
    localhost:.ssh sean$ rm -r known_hosts
    localhost:.ssh sean$ ls
    authorized_keys	id_rsa		id_rsa.pub

> [Permission denied (publickey)][Permission denied _publickey]

*  注意要点2 - 端口号  
    要注意查看远程的服务器端口号配置是否开启. `22`端口是SSH登陆端口. / `3389`是Windoows服务器要开放的端口.  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA0MTYxMDE_size_16_color_FFFFFF_t_70]

> \[1\]. [ssh远程登录阿里云ecs服务器不成功解决方案][ssh_ecs]  
> \[2\]. [阿里云服务器终端连接（SSH）!!!"拒绝连接"的解决][SSH]

*  注意要点3 - SSH开放密码登陆

> vi /etc/ssh/sshd\_config 将PasswordAuthentication的参数设置为yes 应该在文件末尾  
> systemctl restart sshd.service 重启ssh服务  
> systemctl status sshd.service 查看ssh服务状态  
> ssh -p 22 root@112.74.38.117 通过指定端口连接(确保端口已打开) ，也可以不加端口.  
> \[1\]. [Mac终端连接阿里云服务器出现Permission denied (publickey)][Mac_Permission denied _publickey]  
> \[2\]. [Mac终端连接阿里云服务器出现Permission denied (publickey)][Mac_Permission denied _publickey 1]  
> \[3\].

*  注意要点4 - 用户名称写错了

localhost:.ssh sean$ ssh 112.xx.xx.xx
    sean@112.xx.xx.xx's password:
    Permission denied, please try again.
    sean@112.xx.xx.xx's password:
    Permission denied, please try again.
    sean@112.xx.xx.xx's password:
    sean@1112.xx.xx.xx Permission denied (publickey,password).

输入了3次密码. 都是错误. 后来才意识到是用户的问题. 我本地用户为`sean`, 不写用户名. 默认的真实命令为`ssh sean@112.xx.xx.xx`. 但是我在阿里云上配置的为`root`用户. 所以, 难怪登陆不上去.

# 添加用户名和端口
    ssh root@112.xx.xx.xx -port 22

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OK. 问题`FIxed`. 我们进入下一轮免密登陆环节.

[Permission denied _publickey]: https://www.jianshu.com/p/14027e35b900
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTA0MTYxMDE_size_16_color_FFFFFF_t_70]: /images/20221022/ea0c87d90e4d4798b6934f9d015dda24.png
[ssh_ecs]: https://blog.csdn.net/karmacode/article/details/78911764
[SSH]: https://blog.csdn.net/baidu_41537622/article/details/104795175
[Mac_Permission denied _publickey]: https://blog.csdn.net/Axela30W/article/details/81940557
[Mac_Permission denied _publickey 1]: https://blog.csdn.net/ELFFA/article/details/89641330