sshd[12282]: fatal: matching cipher is not supported: aes256-gcm@ [preauth]

在/etc/ssh/ssh_config中增加如下配置即可

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,aes192-cbc,aes256-cbc,arcfour256,arcfour128,3des-cbc

//开头字母大写即可