$ sudo apt-get update
$ sudo apt-get install libcrypt-ssleay-perl 

libcrypt-ssleay-perl is installed in your system.

Make ensure the libcrypt-ssleay-perl package were installed using the commands given below,

$ sudo dpkg-query -l | grep libcrypt-ssleay-perl *

You will get with libcrypt-ssleay-perl package name, version, architecture and description in a table

libcrypt-ssleay-perl package basic information: