To know details of a Linux package, example:
$ rpm -qi firefox
gives this:
Name : firefox
Relocations: (not relocatable)
Version : 45.7.0
Vendor: CentOS
Release : 2.el6.centos
Build Date: Tue 21 Feb 2017 10:37:31 AM EST
Install Date: Wed 22 Feb 2017 02:00:30 PM EST
Build Host: c1bm.rdu2.centos.org
Group : Applications/Internet
Source RPM: firefox-45.7.0-2.el6.centos.src.rpm
Size : 134348863
License: MPLv1.1 or GPLv2+ or LGPLv2+
Signature : RSA/SHA1, Wed 22 Feb 2017 07:19:45 AM EST, Key ID 0946fca2c105b9de
Packager : CentOS BuildSystem <http://bugs.centos.org>
URL : http://www.mozilla.org/projects/firefox/
Summary : Mozilla Firefox Web browser
Description :
Mozilla Firefox is an open-source web browser, designed for standards
compliance, performance and portability.
