1、lsb_release -a 查看当前系统的版本信息
[root@fenye2019 ~]# lsb_release -a
LSB Version: :core-4.1-amd64:core-4.1-noarch
Distributor ID: CentOS
Description: CentOS Linux release 7.4.1708 (Core)
Release: 7.4.1708
Codename: Core
2、openssl version 查看当前系统的openssl的版本;
[root@fenye2019 ~]# openssl version
OpenSSL 1.0.2k-fips 26 Jan 2017
3、那么如何更新 openssl ,首先需要去官网下载,新版本,然后解压编译安装;
官网地址:https://www.openssl.org/source/
[root@fenye2019 src]# wget https://www.openssl.org/source/openssl-1.0.2r.tar.gz^C
[root@fenye2019 src]# tar zxvf openssl-1.0.2r.tar.gz
[root@fenye2019 openssl-1.0.2r]# ./config shared zlib
[root@fenye2019 openssl-1.0.2r]# make
[root@fenye2019 openssl-1.0.2r]# make install
[root@fenye2019 openssl-1.0.2r]# mv /usr/bin/openssl /usr/bin/openssl.bak
[root@fenye2019 openssl-1.0.2r]# mv /usr/include/openssl/ /usr/include/openssl.bak
[root@fenye2019 openssl-1.0.2r]# ln -s /usr/local/ssl/bin/openssl /usr/bin/openssl
[root@fenye2019 openssl-1.0.2r]# ln -s /usr/local/ssl/include/openssl /usr/include/openssl
[root@fenye2019 openssl-1.0.2r]# ldconfig -v^C
[root@fenye2019 openssl-1.0.2r]# echo "/usr/local/ssl/lib" >> /etc/ld.so.conf
[root@fenye2019 openssl-1.0.2r]# openssl version -a
OpenSSL 1.0.2r 26 Feb 2019
built on: reproducible build, date unspecified
platform: linux-x86_64
options: bn(64,64) rc4(16x,int) des(idx,cisc,16,int) idea(int) blowfish(idx)
compiler: gcc -I. -I.. -I../include -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -Wa,--noexecstack -m64 -DL_ENDIAN -O3 -Wall -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m -DRC4_ASM -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DVPAES_ASM -DBSAES_ASM -DWHIRLPOOL_ASM -DGHASH_ASM -DECP_NISTZ256_ASM
OPENSSLDIR: "/usr/local/ssl"
注释:不过建议先把之前的openssl 备份一下的;