openssl

# openssl version -a

openssh

# ssh -V

要准备的包

openssl-1.0.2s.tar.gz

openssh-8.0p1.tar.gz

pam-1.1.8-22.el7.x86_64.rpm

pam-devel-1.1.8-22.el7.x86_64.rpm

zlib-1.2.7-17.el7.x86_64.rpm

zlib-devel-1.2.7-17.el7.x86_64.rpm

telnet-0.17-64.el7.x86_64.rpm

telnet-server-0.17-64.el7.x86_64.rpm

openssl-1.0.2k-12.el7.x86_64.rpm

xinetd-2.3.15-13.el7.x86_64.rpm

如果是离线升级在安装gcc时候会遇到很多安装包，建议能开网就开网，不然就缺啥补啥

安装：

先看看有没有pam

rpm -qa |grep pam

没有就安装

#rpm -Uvh pam-1.1.8-22.el7.x86_64.rpm

#rpm -Uvh pam-devel-1.1.8-22.el7.x86_64.rpm

以次继续

#rpm -Uvh xinetd-2.3.15-13.el7.x86_64.rpm

#rpm -Uvh zlib-1.2.7-18.el7.x86_64.rpm

#rpm -Uvh zlib-devel-1.2.7-18.el7.x86_64.rpm

一般都开telnet，但是我胆子比较大，就不用了，想了解的可以去其他博客