[[email protected] ~]# yum history list policycoreutils
Loaded plugins: auto-update-debuginfo, fastestmirror, presto, refresh-packagekit
ID     | Login user             | Date and time    | Action(s)      | Altered
-------------------------------------------------------------------------------
    74 | System <unset>         | 2010-06-23 01:07 | I, U           |   30   
    54 | System <unset>         | 2010-06-15 12:40 | Update         |   28   
    16 | System <unset>         | 2010-05-27 22:13 | I, U           |  109   
     1 | 100351                 | 2010-05-13 04:55 | Install        | 1086  

Loaded plugins: auto-update-debuginfo, fastestmirror, presto, refresh-packagekit
Login user                 | Time                | Action(s)        | Altered 
-------------------------------------------------------------------------------
System <unset>         | Last week           | I, U             |       30
System <unset>         | Last 2 weeks        | Update           |       28
100351                 | Last 3 months       | Install          |     1086
System <unset>         | Last 3 months       | I, U             |      109
history summary

[[email protected] ~]# yum history info policycoreutils | less

[B]yum history undo last[/B]