使用SSH Secure Shell工具连接报错如下：
Server responded "Algorithm" negotiation failed"
Key exchange with the remote host failed. This can happen for example if the remote host
computer does not support the selected algoritms
解决方法，登录主机：
更改 /etc/ssh/sshd_config文件。
执行命令：
vi /etc/ssh/sshd_config在 PasswordAuthentication yes 的后面追加如下内容。
Ciphers aes128-cbc,aes192-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr,3des-cbc,arcfour128,arcfour256,arcfour,blowfish-cbc,cast128-cbc
MACs hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,hmac-sha1-96,hmac-md5-96
KexAlgorithms diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group-exchange-sha256,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group1-sha1,[email protected]
然后重启ssdh
systemctl restart sshd.service也可以使用命令
service sshd restart 查看下sshd的状态
六：在重新使用SSH Secure Shell 工具连接即可。