Exercise3

exercise3

+#!/bin/bash
+# alive2.sh
+# Checks to see if a range of IP addresses are alive
+# Input should be in the format alive2.sh 192.168.1.7-192.168.1.123
+
+# Validate the input format
+if [[ $1 =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+-[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    start=$(echo $1 | cut -d'-' -f1 | cut -d'.' -f4)
+    end=$(echo $1 | cut -d'-' -f2 | cut -d'.' -f4)
+    
+    # Iterate through IP addresses
+    for ((n=start; n<=end; n++)); do
+        host=$(echo $1 | cut -d'-' -f1 | cut -d'.' -f1-3).$n
+        ping -c2 $host &> /dev/null
+        if [ $? = 0 ]; then
+            echo "$host is UP"
+        else
+            echo "$host is DOWN"
+        fi
+    done
+else
+    echo "Invalid input format. Please use the format alive2.sh 192.168.1.7-192.168.1.123"
+fi