centos7 ssh默认为openssh7.4p1版本： [rootlocalhost ~]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [rootlocalhost ~]# [rootlocalhost ~]# ssh -V OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017