1、查看操作系统、OpenSSH版本信息: [root@test-OpenSSH ~]# cat /etc/redhat-release Rocky Linux release 8.8 (Green Obsidian) [root@test-OpenSSH ~]# telnet localhost 22 Trying ::1... Connected to localhost. Escape character is '^]'. SSH-2.0-OpenSSH_8.0 ^] telnet> quit Conn…