#用pycharm工具ssh client 报 algorithm negotiation failed
#导致原因:是ssh升级后，为了安全，默认不再采用原来一些加密算法，我们手工添加进去即可
#目前出错openssh版本如下:
[root@q704-jzdfwuat-2 ~]# rpm -qa | grep openssh
openssh-6.6.1p1-35.el7_3.x86_64
openssh-clients-6.6.1p1-35.el7_3.x86_64
openssh-server-6.6.1p1-35.el7_3.x86_64
#解决办法
vim /etc/ssh/sshd_config
#在配置文件中添加
#Ciphers aes192-ctr,aes256-ctr
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,umac-64@openssh.com,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,curve25519-sha256@libssh.org
#重启
systemctl restart sshd.service