[wolfy@wolfy ~]$ sudo yum update
livna                     100% |=========================| 2.1 kB    00:00
primary.sqlite.bz2        100% |=========================| 152 kB    00:00
fedora                    100% |=========================| 2.1 kB    00:00

[1]+  Stopped                 sudo yum update
[wolfy@wolfy ~]$ killall -9 yum
yum(5109): Operation not permitted
yum: no process killed
[wolfy@wolfy ~]$ sudo killall -9 yum
[wolfy@wolfy ~]$
[1]+  Killed                  sudo yum update
[wolfy@wolfy ~]$