寻找更好的自动化工作环境的方法

I am working on VMs (virtual machine). I use VMs for testing purpose and i keep frequently creating VMs or switching VMs. The problem is that i need to recreate my working environment every time i create/switch VM. My working environment includes files (.bashrc, .emacs, .emacs.d, .vimrc, .gitconfig etc). Since I need these files for creating my own flexible linux environment. But its headache to keep copying these files every time. Please suggest a better way of recreating my env quickly.I am working on VMs (virtual machine). I use VM