doc: README.md detailed

Author: ABouveron

README.md

@@ -3,6 +3,7 @@ Original repo: https://github.com/keygen-sh/example-python-cryptographic-machine
 
 # How to run
 __Example config:__ 
+**Linux / Windows:**
 ```shell 
 python main.py --fingerprint '198e9fe586114844f6a4eaca5069b41a7ed43fb5a2df84892b69826d64573e39' --path-license examples/license.lic --path-machine examples/machine.lic
 ```
@@ -11,6 +12,9 @@ __Normal config:__
 * Your fingerprint should be the hash of the serial number of your machine (you can execute the program to see it) computed with **SHA3_512** ([Online Converter](https://emn178.github.io/online-tools/sha3_512.html)).  
 * Get your machine file on keygen.sh and put the raw license key in a new file named `license.lic`.  
 * Put your `machine.lic` & `license.lic` in the same folder as `main.py` and run:
+
+**Linux / Windows:**
 ```shell
 python main.py
-```
+```
+(You need to run it as root in Linux because it needs to access `/dev/sda` to get the serial number of your machine.)