Unable to negotiate with 192.168.2.53 port 22: no matching host key type found. Their offer: ssh-rsa

终端远程登录ssh时，提示如下错误：

Unable to negotiate with 192.168.2.53 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss

由提示得知，ssh不能远程登录的原因为：没有找到相关的主机密钥类型。

1、确实是主机密钥类型不符合

2、不存在相关主机密钥类型

生成ssh_key

ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key

ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key

重启ssh之后远程，问题依然存在

确认密钥已存在......

指定主机key算法（最后解决方案）：

1、命令中加参数

ssh -o HostKeyAlgorithms=+ssh-dss user@host

2、在~/.ssh目录下添加config　　

vi config

　　在config中写入以下code：

Host *ServerAliveInterval 10HostKeyAlgorithms +ssh-dssPubkeyAcceptedKeyTypes +ssh-dss

3、重启ssh

systemctl restart sshd

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