getting started back to getting started

getting-started.md

@@ -1,5 +1,37 @@
 # Getting started
 
+Reserve 12Gb of disk and run:
+
+    git clone https://github.com/cirosantilli/linux-kernel-module-cheat
+    cd linux-kernel-module-cheat
+    ./configure && ./build && ./run
+
+The first build will take a while ([GCC](https://stackoverflow.com/questions/10833672/buildroot-environment-with-host-toolchain), Linux kernel), e.g.:
+
+- 2 hours on a mid end 2012 laptop
+- 30 minutes on a high end 2017 desktop
+
+If you don't want to wait, you could also try to compile the examples and run them on your host computer as explained on the ["Run on host" section](run-on-host.md), but as explained on that section, that is dangerous, limited, and will likely not work.
+
+After QEMU opens up, you can start playing with the kernel modules:
+
+    root
+    insmod /hello.ko
+    insmod /hello2.ko
+    rmmod hello
+    rmmod hello2
+
+This should print to the screen:
+
+    hello init
+    hello2 init
+    hello cleanup
+    hello2 cleanup
+
+which are `printk` messages from `init` and `cleanup` methods of those modules.
+
+All available modules can be found in the [`kernel_module` directory](kernel_module/).
+
 ## Module documentation
 
     head kernel_module/modulename.c