====  Show changelog of a package using apt-get ====

Alternatively if the deb is also in the repository and you want to know older versions changelog, you can use apt-get changelog package to read all the changelog. For example for openssl:

<code bash>
apt-get changelog libssl1.0.0
</code>

Source: https://serverfault.com/questions/174737/how-do-i-see-the-changelog-for-a-debian-ubuntu-deb-package