xen-7:~# uname -r
2.6.18-4-xen-amd64
xen-7:~# free
             total       used       free     shared    buffers     cached
Mem:       6175744     422300    5753444          0      61280      44708
-/+ buffers/cache:     316312    5859432
Swap:     11719376          0   11719376
xen-7:~#