Upload files to "OS/bash/Week4"

Signed-off-by: Aadit Agrawal <tech@aaditagrawal.com>

OS/bash/Week4/q4.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+opt="$1"
+file="$2"
+
+case "$opt" in
+	-linecount)
+		result=$(wc -l < "$file")
+		echo "Line count in $file: $result"
+		;;
+	-wordcount)
+		result=$(wc -w < "$file")
+		echo "Word count in $file: $result"
+		;;
+	-charcount)
+		result=$(wc -c < "$file")
+		echo "Character count in $file: $result"
+		;;
+	*)
+        echo "Invalid option. Please use -linecount, -wordcount, or -charcount."
+        exit 1
+        ;;
+esac
+