title: difference between qemu-kvm?
body: <p>what is different between the following type i get qemu-kvm ? boths are use centos 6.4.</p>
  
  <ol>
  <li><p>yum install qemu-kvm ,then show the version:</p>
  
  <p>[root@centos6 qemu-kvm]# /usr/local/bin/qemu-system-x86_64 --version</p>
  
  <p>QEMU emulator version 1.2.50 (qemu-kvm-devel), Copyright (c) 2003-2008 Fabrice Bellard</p></li>
  <li><p>get the source code and build it by gcc.</p>
  
  <p>[root@centos6 qemu-kvm]# /usr/libexec/qemu-kvm --version<br>
   QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2), Copyright (c) 2003-2008 Fabrice Bellard</p></li>
  </ol>