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system/upgrade_debian_12_to_13.sh

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+#!/bin/bash
+
+set -e  # Exit on any error
+
+# Define color codes
+RED='\e[31m'
+GREEN='\e[32m'
+YELLOW='\e[33m'
+BLUE='\e[34m'
+NC='\e[0m'  # No Color
+
+# Ensure the script is run as root
+if [[ $EUID -ne 0 ]]; then
+    echo -e "${RED}This script must be run as root. Try running it with sudo.${NC}"
+    exit 1
+fi
+
+echo -e "${BLUE}Updating package lists and upgrading installed packages...${NC}"
+DEBIAN_FRONTEND=noninteractive apt update && apt upgrade -y -o Dpkg::Options::="--force-confold"
+
+echo -e "${BLUE}Upgrading full system...${NC}"
+DEBIAN_FRONTEND=noninteractive apt full-upgrade -y -o Dpkg::Options::="--force-confold"
+
+echo -e "${BLUE}Removing obsolete packages...${NC}"
+apt autoremove -y
+
+# Update all .list files in /etc/apt/sources.list.d/ and sources.list to Debian 12 Bookworm
+echo -e "${YELLOW}Updating APT sources list to Debian 12 (Bookworm)...${NC}"
+sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list
+sed -i 's/bullseye-security/bookworm-security/g' /etc/apt/sources.list
+find /etc/apt/sources.list.d/ -type f -name "*.list" -exec sed -i 's/bullseye/bookworm/g' {} +
+find /etc/apt/sources.list.d/ -type f -name "*.list" -exec sed -i 's/bullseye-security/bookworm-security/g' {} +
+
+# Update APT cache and perform upgrade
+echo -e "${BLUE}Updating package lists...${NC}"
+apt update
+
+echo -e "${BLUE}Upgrading to Debian 12 Bookworm...${NC}"
+DEBIAN_FRONTEND=noninteractive apt upgrade -y -o Dpkg::Options::="--force-confold"
+DEBIAN_FRONTEND=noninteractive apt full-upgrade -y -o Dpkg::Options::="--force-confold"
+
+echo -e "${BLUE}Cleaning up unnecessary packages...${NC}"
+apt autoremove -y
+apt clean
+
+echo -e "${GREEN}Upgrade completed. A system reboot is required.${NC}"
+read -p "Do you want to reboot now? (y/N) " answer
+if [[ "$answer" =~ ^[Yy]$ ]]; then
+    reboot
+fi