#wget https://www.openssl.org/source/openssl-1.1.0f.tar.gz
 #tar zxvf openssl-1.1.0e.tar.gz
# cd openssl-1.1.0e
# ./config shared zlib
# make
# make install
#替换旧版OpenSSL
mv /usr/bin/openssl /usr/bin/openssl.old
mv /usr/include/openssl /usr/include/openssl.old
ln -s /usr/local/bin/openssl /usr/bin/openssl
ln -s /usr/local/include/openssl/ /usr/include/openssl

安装过程遇到一些问题：
1、解决Centos6编译错误：expecting string instruction

wget http://people.centos.org/tru/devtools-2/devtools-2.repo -O /etc/yum.repos.d/devtools-2.repo
yum install devtoolset-2-gcc devtoolset-2-binutils
yum install devtoolset-2-gcc-gfortran

2、加载共享库时出错：libcrypto.so.1.1
       When I run "openssl" I am getting an error as below :
       openssl: error while loading shared libraries: libcrypto.so.1.1: cannot open shared object file: No such file or directory"
解决办法：
echo "/usr/local/lib64" > /etc/ld.so.conf.d/openssl.conf
ldconfig

确认升级版本

# openssl version -a
OpenSSL 1.1.0f  16 Feb 2017
built on: reproducible build, date unspecified
platform: linux-x86_64
compiler: gcc -DZLIB -DDSO_DLFCN -DHAVE_DLFCN_H -DNDEBUG -DOPENSSL_THREADS -DOPENSSL_NO_STATIC_ENGINE -DOPENSSL_PIC -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DRC4_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM -DPADLOCK_ASM -DPOLY1305_ASM -DOPENSSLDIR="\"/usr/local/ssl\"" -DENGINESDIR="\"/usr/local/lib/engines-1.1\""  -Wa,--noexecstack
OPENSSLDIR: "/usr/local/ssl"
ENGINESDIR: "/usr/local/lib/engines-1.1"

编译安装openssl时使用参数zlib-dynamic和zlib区别
./config shared zlib       #静态链接
./config shared zlib-dynamic   #动态链接
参考资料：
https://www.isthnew.com/upgrade-your-openssl/

https://serverfault.com/questions/818445/error-while-loading-shared-libraries-libcrypto-so-1-1

本文出自 “boyhack” 博客，请务必保留此出处http://461205160.blog.51cto.com/274918/1951527

openssl升级