apt policy

apt policy command show information about a package.

root@ok-vm:~# apt policy  apache2
apache2:
  Installed: 2.4.18-2ubuntu3.5
  Candidate: 2.4.18-2ubuntu3.5
  Version table:
 *** 2.4.18-2ubuntu3.5 500
        500 http://azure.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.4.18-2ubuntu3 500
        500 http://azure.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
root@ok-vm:~# 

It shows the installed version “Installed: 2.4.18-2ubuntu3.5” and the repo from where it is installed.

See apt