When I use \'apt-get install openssl\', my Ubuntu 16.04 install OpenSSL 1.0.2g version. I expect to install 1.1.0 versions.
Why is not install 1.1.0 version? How can
If you are using Ubuntu 18+, version 1.1.0 is now be available via apt.
apt
You can also use apt list openssl to see what can be updated. And even throw in the -a modifier to show all versions available.
apt list openssl
-a