查看“CentOS 升级 Openssl”的源代码

查看版本
 openssl version
下载

 https://www.openssl.org/source/
 wget https://www.openssl.org/source/openssl-1.1.1c.tar.gz

安装zlib和zlib-devel 

 yum install -y zlib zlib-devel

解压下载的openssl 

tar zxf openssl-1.1.1c.tar.gz
cd openssl-1.1.1c
./config shared zlib 
make && make install 
mv /usr/bin/openssl /usr/bin/openssl.bak 
mv /usr/include/openssl /usr/include/openssl.bak 
ln -s /usr/local/bin/openssl /usr/bin/openssl 
ln -s /usr/local/include/openssl /usr/include/openssl 

出错 

 openssl: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory
 ln -s /usr/local/lib64/libssl.so.1.1 /usr/lib64/libssl.so.1.1 
 ln -s /usr/local/lib64/libcrypto.so.1.1 /usr/lib64/libcrypto.so.1.1

测试

 openssl version
 OpenSSL 1.1.1c  28 May 2019