1.yum install openssh-server
2.启动sshd 报错 需要绝对路径
[root@0463226081ca src]# sshd
sshd re-exec requires execution with an absolute path
3.用绝对路径 再次报错
[root@0463226081ca src]# /usr/sbin/sshd
Could not load host key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_ecdsa_key
Could not load host key: /etc/ssh/ssh_host_ed25519_key
sshd: no hostkeys available -- exiting.
4.执行 少什么生成什么key
ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
5.再次执行 成功
[root@0463226081ca src]# /usr/sbin/sshd
[root@0463226081ca src]#
6.外部连接还是失败 修改/etc/sshd/sshd_config配置文件 重启再连 成功
UsePAM no