本文参考：https://www.cnblogs.com/wenxiao1-2-3-4/p/16481300.html
#!/bin/sh
cd /etc/yum.repos.d
mkdir backup
mv Cent* backup
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-9.repo
yum -y clean all
yum -y makecache #以上设置云源
cd /tmp
mkdir update
cd update
wget –no-check-certificate https://mirrors.aliyun.com/pub/OpenBSD/OpenSSH/portable/openssh-9.4p1.tar.gz
tar xf openssh-9.4p1.tar.gz
yum -y install zlib zlib-devel perl openssl-devel
yum -y install gcc gcc-c++
mv /etc/ssh /etc/ssh.bak
cd /tmp/update/openssh-9.4p1
mkdir /usr/local/openssh
cd /tmp/update/openssh-9.4p1
./configure –prefix=/usr/local/openssh –sysconfdir=/etc/ssh –with-openssl-includes=/usr/local/include –with-ssl-dir=/usr/local/bin/openssl –with-zlib –with-md5-passwords –without-openssl-header-check
#centos7是下面
#./configure –prefix=/usr/local/openssh –sysconfdir=/etc/ssh –with-openssl-includes=/usr/local/include –with-ssl-dir=/usr/local/bin/openssl –with-zlib –with-md5-passwords –without-openssl-header-check
make
make install
echo “UseDNS no” >> /etc/ssh/sshd_config
echo ‘PermitRootLogin yes’ >> /etc/ssh/sshd_config
echo ‘PubkeyAuthentication yes’ >> /etc/ssh/sshd_config
echo ‘PasswordAuthentication yes’ >> /etc/ssh/sshd_config
echo “X11Forwarding yes” >> /etc/ssh/sshd_config
#echo “X11UseLocalhost no” >> /etc/ssh/sshd_config
echo “XAuthLocation /usr/bin/xauth” >> /etc/ssh/sshd_config
mv /usr/sbin/sshd /usr/sbin/sshd0909
mv /usr/bin/ssh /usr/bin/ssh0909
mv /usr/bin/ssh-keygen /usr/bin/ssh-keygen0909
ln -s /usr/local/openssh/bin/ssh /usr/bin/ssh
ln -s /usr/local/openssh/bin/ssh-keygen /usr/bin/ssh-keygen
ln -s /usr/local/openssh/sbin/sshd /usr/sbin/sshd
ssh -V
mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service.bak
cp -arf ./contrib/redhat/sshd.init /etc/rc.d/init.d/sshd
cp -arf ./contrib/redhat/sshd.pam /etc/pam.d/sshd.pam
chkconfig –add sshd
systemctl enable sshd –now
systemctl restart sshd
/etc/rc.d/init.d/sshd目录加入启动脚本后，systemctl start sshd 如识别不到,请尝试关闭selinux 或者重启系统尝试，执行启动脚本后报错误如下：
查看文件/etc/rc.d/init.d/sshd 文件49行，文件如下
将编译后的配置文件拷贝到 /etc/ssh/下，重新执行,仍然报错。查看脚本第一行发现缺少文件
拷贝centos7.6版本的functions 文件上传，重新启动后成功
可从cnetos7系列系统中/etc/init.d/目录提取，这里我上传了一个我使用的文件
如ssh启动不了，如下：
#关闭selinux vi /etc/selinux/config 手工
#修改SELINUX=enforce为SELINUX=disable 重启服务器后
restorecon -r -v /root/.ssh
#开启selinux vi /etc/linux/config 手工
#修改为SELINUX=enforcing
systemctl start sshd
