Hi. I've got the next problem.
I've installed Kali on dedicated partition, and used it with Windows 7 on other normally. But one day got MBR corrupted. I had Kali live USB, used it to boot in live mode, and wanted to restore grub MBR with grub-install. But actually i can not find and run commands grub-install, grub-update, etc. Typing "gr" and pushing tab twice shows that there is no such commands available. And at the same time, when choosing installation from liveUSB, installation program writes smth like "getting additional packages from disk", and get grub and some other packages indeed. So how can i get this packages from image manually? Couldn't find info on topic, but if the question is really stupid, will appreciate for a golden punch.