My final menu script submission

README.md

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+# Menu Script
+This is a correction for why you could not see disk usage in menu.sh
+
+## How to run
+1. Why you could not see disk usage when you pressed and entered 2 was because there were no curly brace around 'print $1'.
+2. I added the curly braces to the 'print $1'

menu.sh

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+!/bin/bash
+
+#Colour Definitions
+
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' #No colour
+
+#Print coloured message
+
+print_colour() {
+    echo -e "${1}${2}${NC}"
+}
+
+#Show system information
+
+show_system_info() {
+    clear
+    print_colour $BLUE "==== SYSTEM INFORMATION ===="
+    echo ""
+
+    echo "Hostname: $(hostname)"
+    echo "Kernel: $(uname -r)"
+    echo "Uptime: $(uptime -p)"
+    echo "Date: $(date)"
+    echo ""
+
+    read -p "Press Enter to Continue...."
+
+}
+
+#Show Disk Usage
+
+show_disk_usage() {
+    clear
+    print_colour $GREEN "==== DISK USAGE ===="
+    echo ""
+
+    df -h | head -10
+    echo ""
+
+    df -h | tail -n +2 | while read line; do
+        use_percent=$(echo $line | awk '{print $5}' | sed 's/%//')
+        if [[ $use_percent -gt 80 ]]; then
+            print_colour $RED "Warning: $(echo $line | awk '{print $1}') is ${use_percent}% full"
+        fi
+
+    done
+
+    echo ""
+
+    read -p "Press Enter to Continue...."
+}
+
+#Monitor running processes
+
+monitor_processes() {
+    clear
+    print_colour $YELLOW "==== TOP PROCESSES ===="
+    echo ""
+
+    echo "1. By CPU usage"
+    ps aux --sort=-%cpu | head -6
+    echo ""
+
+    echo "2. By memory usage"
+    ps aux --sort=-%mem | head -6
+    echo ""
+
+    read -p "Press Enter to Continue...."
+
+}
+
+
+#Create a new user
+
+create_user() {
+    clear
+    print_colour $BLUE "==== CREATE NEW USER ===="
+    echo""
+
+    read -p "Enter username: " username
+    read -p "Enter full name: " fullname
+
+    if [[ -z "username" ]] || [[ -z "fullname" ]]; then
+        print_colour $RED "Error: Username and fullname required"
+    else
+        echo ""
+	echo "Would create user:"
+	echo " Username: $username"
+	echo " Full Name: $fullname"
+	echo " Home: /home/$username"
+        print_colour $GREEN "User '$username' ready to be created"
+    fi
+
+    echo ""
+    read -p "Press Enter to Continue...."
+
+}
+
+#Show main menu
+
+show_menu() {
+    clear
+    print_colour $GREEN "==== SYSTEM ADMIN MENU ===="
+    echo ""
+    echo "1. Show System Information"
+    echo "2. Check Disk Usage"
+    echo "3. Monitor Processes"
+    echo "4. Create New User"
+    echo "0. Exit"
+    echo ""
+
+}
+
+#Main program loop
+
+main() {
+    while true; do
+        show_menu
+
+	read -p "Enter your choice: " choice
+
+	case $choice in
+		1) show_system_info ;;
+		2) show_disk_usage ;;
+		3) monitor_processes ;;
+		4) create_user ;;
+		0) print_colour $GREEN "Goodbye!"
+		   exit 0 ;;
+		*) print_colour $RED "Invalid choice! Try again!"
+		   sleep 2 ;;
+	esac
+    done
+
+}
+
+main