ssh登錄一些老舊設備，出現以下問題：
問題：Unable to negotiate with 192.168.xx.xx port 22: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1
解決：-oKexAlgorithms=+diffie-hellman-group1-sha1
問題：Unable to negotiate with 192.168.xx.xx port 22: no matching host key type found. Their offer: ssh-dss
解決：-oHostKeyAlgorithms=+ssh-dss
問題：Unable to negotiate with 192.168.xx.xx port 22: no matching cipher found. Their offer: 3des-cbc
解決：-oCiphers=+3des-cbc
最后命令是這樣的：
ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 -oHostKeyAlgorithms=+ssh-dss -oCiphers=+3des-cbc user@192.168.xx.xx
https://zhuanlan.zhihu.com/p/30840210