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步骤升级方法一具体的内容请查看脚本内容
代码语言：javascript代码运行次数：0运行复制#!/bin/bash
## 查看现有的ssh的版本并升级到最新版本
cd /opt
ssh -V
openssl version
yum update openssh -y
## 安装启动并配置telnet服务 | 防止ssh升级失败无法访问服务器
yum install -y telnet-server* telnet xinetd
systemctl enable xinetd.service
systemctl enable telnet.socket
systemctl start telnet.socket
systemctl start xinetd.service
echo 'pts/0' >>/etc/securetty
echo 'pts/1' >>/etc/securetty
echo 'pts/2' >>/etc/securetty
## 升级ssh
yum install -y gcc gcc-c++ glibc make autoconf openssl openssl-devel pcre-devel pam-devel
yum install -y pam* zlib*
wget -c https://openbsd.hk/pub/OpenBSD/OpenSSH/portable/openssh-8.1p1.tar.gz
wget -c https://ftp.openssl.org/source/openssl-1.0.2r.tar.gz
tar xfz openssh-8.1p1.tar.gz
tar xfz openssl-1.0.2r.tar.gz
mv /usr/bin/openssl /usr/bin/openssl_bak
mv /usr/include/openssl /usr/include/openssl_bak
cd /opt/openssl-1.0.2r
./config shared && make && make install
echo $?
ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
ln -s /usr/local/ssl/include/openssl /usr/include/openssl
echo "/usr/local/ssl/lib" >> /etc/ld.so.conf
/sbin/ldconfig
openssl version
cd /opt/openssh-8.1p1
chown -R root.root /opt/openssh-8.1p1
cp -r /etc/ssh /tmp/
rm -rf /etc/ssh
./configure --prefix=/usr/ --sysconfdir=/etc/ssh --with-openssl-includes=/usr/local/ssl/include --with-ssl-dir=/usr/local/ssl --with-zlib --with-md5-passwords --with-pam && make && make install
echo $?
cat > /etc/ssh/sshd_config < PermitRootLogin yes AuthorizedKeysFile .ssh/authorized_keys UseDNS no Subsystem sftp /usr/libexec/sftp-server EOF grep "^PermitRootLogin" /etc/ssh/sshd_config cat /tmp/ssh/sshd_config |grep -v '#' |grep -v '^$' 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 mv /usr/lib/systemd/system/sshd.service /opt/ mv /usr/lib/systemd/system/sshd.socket /opt/ chkconfig sshd on service sshd restart openssl version ssh -V关闭telnet服务自测后如果没有问题的话,自行把telnet服务关闭 代码语言：javascript代码运行次数：0运行复制systemctl disable xinetd systemctl disable telnet.socket systemctl stop xinetd.service systemctl stop telnet.socket效果如下升级方法二升级包 链接：https://share.weiyun.com/BhDw35zi 确认gcc等工具已经安装好了为了安全直接屏蔽了root账户,确认创建好非root账户登录ssh代码语言：javascript代码运行次数：0运行复制##SSH升级 mv /usr/bin/openssl /usr/bin/openssl.bak tar -zxvf openssl-1.1.1g.tar.gz cd openssl-1.1.1g ./config shared && make && make install \cp -rvf include/openssl /usr/include/ ln -s /usr/local/bin/openssl /usr/bin/openssl ln -snf /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so ln -snf /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so.1.1 ln -snf /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so ln -snf /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1 ldconfig openssl version # 备份 cp /usr/bin/ssh /usr/bin/ssh.bak cp /usr/sbin/sshd /usr/sbin/sshd.bak mv /etc/ssh /etc/ssh.bak tar -zxvf openssh-8.3p1.tar.gz cd openssh-8.3p1 ./configure --prefix=/usr/ --sysconfdir=/etc/ssh --with-ssl-dir=/usr/local/ssl --with-zlib --with-md5-passwords make && make install # 修改启动文件和pam cp ./contrib/redhat/sshd.init /etc/init.d/sshd cp -a contrib/redhat/sshd.pam /etc/pam.d/sshd.pam mv /usr/lib/systemd/system/sshd.service /usr/lib/systemd/system/sshd.service_bak systemctl daemon-reload systemctl restart sshd systemctl status sshd