1、Centos 7.9 原有的openssl 版本太低，安装某些软件提示需要升级
首先从https://www.icewalkers.com/linux/software/518010/openssl.html 下载3.3版本。github 正常途径已无法登录。
tar -zxvf openssl-3.3.0.tar.gz
cd openssl-3.3.0
./config --prefix=/usr/local/ssl3.3 --openssldir=/usr/local/ssl3.3 shared zlib make make install
如果上述步骤在 config 步骤报错：Can't locate IPC/Cmd.pm in @INC
Can't locate IPC/Cmd.pm in @INC (@INC contains: /opt/soft/openssl-3.3.0/util/perl /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 . /opt/soft/openssl-3.3.0/external/perl/Text-Template-1.56/lib) at /opt/soft/openssl-3.3.0/util/perl/OpenSSL/config.pm line 19.
BEGIN failed--compilation aborted at /opt/soft/openssl-3.3.0/util/perl/OpenSSL/config.pm line 19.
Compilation failed in require at /opt/soft/openssl-3.3.0/Configure line 23.
BEGIN failed--compilation aborted at /opt/soft/openssl-3.3.0/Configure line 23.
root@localhost openssl-3.3.0# cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)
则需要安装下面的依赖包
sudo yum groupinstall 'Development Tools'
sudo yum install perl-core zlib-devel，yum -y install perl-IPC-Cmd
配置动态库链接 echo "/usr/local/ssl/lib64" > /etc/ld.so.conf.d/openssl.conf
更新系统的库缓存 ldconfig
替换旧版的目录 cp /usr/local/ssl/bin/openssl /usr/bin/openssl
使用新的OpenSSL版本 ldconfig -v
输入cp /usr/bin/python /usr/bin/python_old按回车键
输入rm -rf /usr/bin/python按回车键
输入ln -s /usr/local/python3/bin/python3 /usr/bin/pyton按回车键
输入python --version按回车键查看版本