How do I find out OpenSSL version ?

Execute following command to find OpenSSL Version.

[root@amitmaheshwari.in ~]# openssl version

OpenSSL 1.0.0-fips 29 Mar 2010

For more Information use "-a " along with commad 

[root@amitmaheshwari.in ~]# openssl version -a
OpenSSL 1.0.0-fips 29 Mar 2010
built on: Tue May 29 18:16:48 BST 2012
platform: linux-x86_64
options:  bn(64,64) md2(int) rc4(16x,int) des(idx,cisc,16,int) blowfish(idx)
compiler: gcc -fPIC -DOPENSSL_PIC -DZLIB -DOPENSSL_THREADS -D_REENTRANT -DDSO_DLFCN -DHAVE_DLFCN_H -DKRB5_MIT -m64 -DL_ENDIAN -DTERMIO -Wall -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -Wa,--noexecstack -DMD32_REG_T=int -DOPENSSL_IA32_SSE2 -DOPENSSL_BN_ASM_MONT -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DMD5_ASM -DAES_ASM -DWHIRLPOOL_ASM
OPENSSLDIR: "/etc/pki/tls"
engines:  aesni dynamic
 
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