下载软件：
http://www.zlib.net/zlib-1.2.11.tar.gz
https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-8.8p1.tar.gz
openssl-1.1.1l.tar.gz
脚本
#!/bin/bash
path_src=`pwd`
cd $path_src
tar -xvf openssl-1.1.1l.tar.gz
tar -xvf openssh-8.8p1.tar.gz
tar -xvf zlib-1.2.11.tar.gz
tar -xvf gcc_package.tar.gz
#0.检查依赖
rpm -q gcc
if [ $? != 0]; then
yum localinstall gcc_package -y
fi
#1.zlib
cd zlib-1.2.11
./configure --prefix=/usr/local/zlib
make && make install
cd ..
#2.编译安装openssl
cd openssl-1.1.1l
./config --prefix=/usr/local/ssl -d shared
make && make install
cd ..
#3.安装openssh
cd openssh-8.8p1
./configure --prefix=/usr/local/openssh --with-zlib=/usr/local/zlib --with-ssl-dir=/usr/local/ssl
make && make install
cd ..
#4.sshd_config 文件修改
echo 'PermitRootLogin yes' >>/usr/local/openssh/etc/sshd_config
echo 'PubkeyAuthentication yes' >>/usr/local/openssh/etc/sshd_config
echo 'PasswordAuthentication yes' >>/usr/local/openssh/etc/sshd_config
#5.替换/etc/ssh里的文件
mv /usr/sbin/sshd /usr/sbin/sshd.bak
cp /usr/local/openssh/sbin/sshd /usr/sbin/sshd
mv /usr/bin/ssh /usr/bin/ssh.bak
cp /usr/local/openssh/bin/ssh /usr/bin/ssh
mv /usr/bin/ssh-keygen /usr/bin/ssh-keygen.bak
cp /usr/local/openssh/bin/ssh-keygen /usr/bin/ssh-keygen
mv /etc/ssh/ssh_host_ecdsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub.bak
cp /usr/local/openssh/etc/ssh_host_ecdsa_key.pub /etc/ssh/ssh_host_ecdsa_key.pub
mv /etc/ssh/ssh_host_dsa_key.pub /etc/ssh/ssh_host_dsa_key.pub.bak
cp /usr/local/openssh/etc/ssh_host_dsa_key.pub /etc/ssh/ssh_host_dsa_key.pub
#6.更换openssl文件 这一步操作完成后 输入openssl version会发现openssl版本已经发生变化
mv /usr/bin/openssl /usr/bin/openssl_bak
cp /usr/local/ssl/bin/openssl /usr/bin/openssl
mv /usr/include/openssl /usr/include/openssl_bak
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
echo "/usr/local/ssl/lib" >> /etc/ld.so.conf
/sbin/ldconfig
cd ..
#7.替换启动文件
cd openssh-8.8p1
cp -a contrib/redhat/sshd.init /etc/init.d/sshd
cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam
chmod +x /etc/init.d/sshd
chkconfig --add sshd
systemctl enable sshd
#8.sshd.service 会跟etc/init.d/sshd 文件形成冲突，而sshd.socket重启之后会发生报错所以进行移除
mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service_bak
mv /usr/lib/systemd/system/sshd.socket /usr/lib/systemd/system/sshd.socket_bak
#9.添加ssh开机启动
chkconfig sshd on
/etc/init.d/sshd restart
#10.重新生成rsa dsa key （这一步是因为怕本地证书不符，所以加上的，可以不进行操作，请自测）
ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key -P "" -q
ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key -P "" -q
#11.ssh -V 进行测试
ssh -V
openssl version