diff --git a/README.md b/README.md
index 8bdeaef..1fcf703 100644
--- a/README.md
+++ b/README.md
@@ -118,10 +118,8 @@ If you are not familiar with manual partitioning, then you are in for a real tre
 
 The easiest way to check that is to run:
 ```sh
-ls -d /sys/firmware/efi
+[ -d "/sys/firmware/efi" ] && echo "UEFI" || echo "Legacy BIOS"
 ```
-If directory exists (the output will not be an error), then your system is UEFI. If it does not exist, then your system is Legacy BIOS. Make sure that you typed it correctly.
-
 You will need to know this for disk partitioning later on.
 
 From now on, follow the CLI or GUI installation guide.