yum install  -y gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel  pam-devel

yum install  -y pam* zlib*

mkdir -p /usr/local/src/openssh_8.1p1
cd /usr/local/src/openssh_8.1p1
wget https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/openssh-8.1p1.tar.gz
wget https://ftp.openssl.org/source/openssl-1.0.2r.tar.gz

tar zxfz openssh-8.1p1.tar.gz
tar zxfz openssl-1.0.2r.tar.gz

mv /usr/bin/openssl /usr/bin/openssl_bak
mv /usr/include/openssl /usr/include/openssl_bak

cd /usr/local/src/openssh_8.1p1/openssl-1.0.2r
./config --prefix=/usr/loca/openssl shared && make && make install

ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/openssl/include/openssl /usr/include/openssl
echo "/usr/local/openssl/lib" >> /etc/ld.so.conf
ldconfig

mv /etc/ssh /etc/ssh_bak
mv /etc/init.d/sshd /etc/init.d/sshd_bak

cd /usr/local/src/openssh_8.1p1/openssh-8.1p1
./configure --prefix=/usr --sysconfdir=/etc/ssh --with-openssl-includes=/usr/local/openssl/include --with-ssl-dir=/usr/local/openssl --with-pam --with-zlib --with-md5-passwords --with-tcp-wrappers && make && make install

修改/etc/ssh/sshd_config
    PermitRootLogin yes
    UseDNS no
	
RHEL7需要先移除/usr/lib/systemd/system下的sshd打头文件
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
chkconfig sshd on