Whether your VPS is OpenVZ or Xen under CentOS

Original: http://www.centoscn.com/CentOS/Intermediate/2015/0330/5056.html
1, execution: ls/proc/command, General Xen Vps,/proc directory below will have Xen directory, OpenVZ will have vz directory.
2, execution: free-m command to see the memory, OpenVZ no swap, of course, there is no swap of Xen, but Xen is can add, OpenVZ not.
3, execution: uname-a command, some Xen VPS inside will show Xen.
4, execution: ifconfig command to view the network card, OpenVZ is generally venet0:*, Xen is generally eth*.

Whether your VPS is OpenVZ or Xen under CentOS