Add files via upload

lib/logging.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+log_info() {
+    echo -e "${GREEN}[INFO] $1${NC}"
+}
+
+log_warning() {
+    echo -e "${YELLOW}[WARNING] $1${NC}"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR] $1${NC}" >&2
+}
+
+backup_config() {
+    local config_file=$1
+    if [ -f "$config_file" ]; then
+        local backup_file="${config_file}.$(date +%F-%T).bak"
+        handle_error sudo cp "$config_file" "$backup_file"
+        log_info "Backup of $config_file created at $backup_file"
+    fi
+}