Default linux on nexus 5-help pls

hello,
I'm trying to run Linux on my N5,but it don't work.I made very step right as complete Linux installer say.I tried many rooms and kernels.cm,miui,mahdi,android L.(kernel :brood,elemental,stock,mahdi.)I don't get any error.after I press start Linux,the cmd shows up,some commands and nothing happen.I get on miui error :no permission.I think is because no root.can somebody help me?thx.
screen shoat: