Query latest updates in Linux via RPM (YUM)

rpm -qa --qf '%{INSTALLTIME} %{INSTALLTIME:date}: %-40{NAME} %{VERSION}-%{RELEASE}.%{ARCH}\n' | sort -n  | cut -d' ' -f2-

{InstallTime:Date}               {NAME}                                   {VERSION}-{RELEASE}.{ARCH}
...
Fri 09 Jan 2015 11:08:56 AM EST: ntp                                      4.2.6p5-2.el6_6.x86_64
Fri 09 Jan 2015 11:09:00 AM EST: mailx                                    12.4-8.el6_6.x86_64
Fri 09 Jan 2015 11:09:06 AM EST: jasper-libs                              1.900.1-16.el6_6.2.x86_64

This queries all your installed RPM packages (rpm -qa) and prints them using a format (--qf) with the time of installation first in seconds since the epoch(%{INSTALLTIME}). The result is sorted by the first time field, and then that time field is removed.

%-40{NAME}	Package Name (40 characters, left justified)
%{VERSION}	Version
%{RELEASE}	Release
%{ARCH}	Architecture (e.g. 64 bit or 32 bit)