Update 'README.md'

README.md

@@ -34,6 +34,10 @@ This creates `threads.html` and extracts all information into the directory.
 
 ```ls *.mp4 | cat -n```
 
+### Compare Differences in two text files
+
+`diff file1 file2`
+
 ### Recursively Zip subdirectories into their own .zip files
 
 ```for i in */; do zip -r "${i%/}.zip" "$i"; done```