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update_system.sh

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+#!/bin/bash
+# update_system.sh - Apply system package updates
+# 
+# Copyright (C) 2025 LINUXexpert.org
+# 
+# This program is free software: you can redistribute it and/or modify it 
+# under the terms of the GNU General Public License as published by the 
+# Free Software Foundation, version 3 of the License.
+# 
+# This program is distributed in the hope that it will be useful, but 
+# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
+# for more details.
+# 
+# You should have received a copy of the GNU General Public License along 
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+# 
+# Usage: update_system.sh    (no arguments, run as root)
+# Description: Detects the Linux distro's package manager and installs all updates.
+ 
+# Ensure running as root
+if [ "$EUID" -ne 0 ]; then
+  echo "Please run as root to apply system updates."
+  exit 1
+fi
+
+if command -v apt-get &> /dev/null; then
+  echo "Updating with apt-get..."
+  apt-get update && apt-get upgrade -y
+elif command -v apt &> /dev/null; then
+  echo "Updating with apt..."
+  apt update && apt upgrade -y
+elif command -v dnf &> /dev/null; then
+  echo "Updating with dnf..."
+  dnf upgrade -y
+elif command -v yum &> /dev/null; then
+  echo "Updating with yum..."
+  yum update -y
+elif command -v zypper &> /dev/null; then
+  echo "Updating with zypper..."
+  zypper refresh && zypper update -y
+elif command -v pacman &> /dev/null; then
+  echo "Updating with pacman..."
+  pacman -Syuu --noconfirm
+else
+  echo "Error: No supported package manager found on this system."
+  exit 1
+fi