Edit README file

README.md

@@ -31,7 +31,7 @@ code .
 * View the cheatsheet file(s) with `cat`, `less`, or open them in an editor:
 
 ```bash
-less commands.txt
+less Linux-Commands.txt
 cat README.md
 ```
 
@@ -51,8 +51,6 @@ git clone --depth 1 https://app.gitpasha.com/Mahmoud-Walid/Linux-Commands.git
 git pull origin main
 ```
 
-(Replace `main` with the default branch name if it's different.)
-
 ---
 
 ## Author