VNC 連線至主機，執行以下指令碼（請提前使用 scp 上傳該檔案到主機）：

#!/bin/bash
set -e

echo '1. download openssh source code'
cd /usr/local/src
rm -rf openssh-8.9p1.tar.gz openssh-8.9p1
curl -O https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-8.9p1.tar.gz

echo '2. install dependency'
dnf install wget gcc automake autoconf libtool make
 
 zlib-devel openssl-devel pam-devel libselinux-devel -y

echo '3. uninstall old version for openssh'
rpm -e --nodeps `rpm -qa | grep openssh`

echo '4. unpackage openssh source code and configure'
tar -zxvf openssh-8.9p1.tar.gz
cd openssh-8.9p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-md5-passwords --with-pam --with-zlib --with-tcp-wrappers --with-ssl-dir
 
=/usr/local/ssl --without-hardening

echo '5. make and install'
make && make install
chmod 600 /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_ecdsa_key /etc/ssh/ssh_host_ed25519_key
cp -a contrib/redhat/sshd.init /etc/init.d/sshd
chmod u+x /etc/init.d/sshd
chkconfig --add sshd
chkconfig sshd on

sed -i 's/#PermitRootLogin prohibit-password/#PermitRootLogin prohibit-password\nPermitRootLogin yes/g
 
' /etc/ssh/sshd_config
systemctl restart sshd
echo '6. openssh update success, new version is: '
echo $(ssh -V)