Added some compability for command name differences on different distros. Added some requirements documentation.

README.md

@@ -1,4 +1,13 @@
 # Kernel
 ## Synopsis
 
-A hobby OS written in Nim.
+A hobby OS written in Nim.
+
+## Requirements
+* nim
+* clang
+* glibc-32
+* nasm
+* grub2
+* make
+* qemu

builddisc.sh

@@ -3,4 +3,8 @@ rm -r isodir
 mkdir -p isodir/boot/grub
 cp myos.bin isodir/boot/kernel
 cp grub.cfg isodir/boot/grub/grub.cfg
-grub-mkrescue -o myos.iso isodir
+if command -v grub-mkrescue; then
+  grub-mkrescue -o myos.iso isodir
+elif command -v grub2-mkrescue; then
+  grub2-mkrescue -o myos.iso isodir
+fi