Install KVM

Becuase The Intel Hardware Accelerated Execution Manager (Intel® HAXM) is not compatible with linux, so I find KVM can do the same work.

How to Start Intel Hardware-assisted Virtualization (hypervisor) on Linux to Speed-up Intel Android x86 Emulator 
From up link I begin to install KVM, at first I am sure that my computer is supported.
But the down code makes me confused.

$ sudo adduser your_user_name kvm
$ sudo adduser your_user_name libvirtd

With this page I compete install successfully
https://help.ubuntu.com/community/KVM/Installation