#解压压缩包
tar xzf openssh-9.3p2_rpm_for_centos7.9.tar.gz
#备份文件
cp /etc/ssh/sshd_config /root/
cp /etc/pam.d/sshd /root/
#安装
yum localinstall openssh-9.3p2-1.el7.x86_64.rpm openssh-clients-9.3p2-1.el7.x86_64.rpm openssh-server-9.3p2-1.el7.x86_64.rpm -y
#恢复配置文件
cp sshd_config /etc/ssh/ #输入y
cp sshd /etc/pam.d/ #输入y
vim /etc/ssh/sshd_config
PermitRootLogin yes #去掉注释
PasswordAuthentication yes #去掉注释
#更改文件权限
chmod 600 /etc/ssh/ssh_host_rsa_key
chmod 600 /etc/ssh/ssh_host_ecdsa_key
chmod 600 /etc/ssh/ssh_host_ed25519_key
#重启服务
systemctl restart sshd
