1.上传openSSH安装包
openssh-9.8p1-1.el7.x86_64.rpm
openssh-clients-9.8p1-1.el7.x86_64.rpm
openssh-debuginfo-9.8p1-1.el7.x86_64.rpm
openssh-server-9.8p1-1.el7.x86_64.rpm
2.删除原版本（若原先不是yum安装的也可直接安装新的）
yum remove openssh*
3.安装新版本
rpm -Uvh openssh-*.rpm
4.查看最新版本
rpm -qa|grep openssh
openssh-clients-9.8p1-1.el7.x86_64
openssh-9.8p1-1.el7.x86_64
openssh-debuginfo-9.8p1-1.el7.x86_64
openssh-server-9.8p1-1.el7.x86_64
5.重启ssh
systemctl restart sshd.service
6.查看ssh状态
systemctl status sshd.service
7.若重启失败，报类似的错
Permissions 0640 for ‘/etc/ssh/ssh_host_rsa_key’ are too open.
修改权限
chmod 0600 /etc/ssh/ssh_host_rsa_key
chmod 0600 /etc/ssh/ssh_host_ecdsa_key
chmod 0600 /etc/ssh/ssh_host_ed25519_key
8.再次重启并新开窗口，看是否可以正常连接，并查看openSSH版本
[root@localhost ssh]# ssh -V
OpenSSH_9.8p1, OpenSSL 3.0.14 4 Jun 2024