Set up a static adress for the BeagleBone White

Good morning,
I’m working on a project with the beaglebone black,and i want to set up a static adress for the beaglebone white.
when i search in the net,i found a guide with connman,the problem,i dont’have connman in the beagle or in the pc
so when i tried apt-get install connman, my pc became abnormal,i lost many adapters specially the wifi adapter and i lost the ability to connect telling me no bleutooth adapters found!
i have so to reinstall kubuntu 12.04 i tried also to found opkg but it dont’t exist
how to do so?I’m blocked.Help please