centos如何安装ssh？

yum install -y openssl openssh-server

systemctl start sshd.service

systemctl enable sshd.service

$ cd ~
$ chmod 700 .ssh                                                                                                
$ chmod 600 .ssh/*                                                                                              
$ ls -la .ssh                                                                                                   
total 16
drwx------. 2 root root   58 May 15 00:23 .
dr-xr-x---. 8 root root 4096 May 15 00:26 ..
-rw-------. 1 root root  403 May 15 00:22 authorized_keys
-rw-------. 1 root root 1766 May 15 00:21 id_rsa
-rw-------. 1 root root  403 May 15 00:21 id_rsa.pub