189 lines
5.8 KiB
Bash
189 lines
5.8 KiB
Bash
#!/bin/bash
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# Linux 系统清理脚本（含 NAS 系统识别与确认）
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# ===============================
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# !!! 警告 !!!
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# 本脚本不适用于 NAS 系统（如 Synology DSM、TrueNAS、OpenMediaVault 等）。
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# 如果你在 NAS 上运行，可能会造成系统损坏！
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# 请谨慎操作！
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# ===============================
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# 检查是否为 NAS 系统的特征
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nas_flag=0
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if grep -qi 'synology' /etc/os-release 2>/dev/null || \
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grep -qi 'freenas' /etc/os-release 2>/dev/null || \
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grep -qi 'truenas' /etc/os-release 2>/dev/null || \
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grep -qi 'zos' /etc/os-release 2>/dev/null || \
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grep -qi 'openmediavault' /etc/os-release 2>/dev/null; then
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nas_flag=1
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fi
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if [ "$nas_flag" -eq 1 ]; then
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echo "⚠️ 警告：检测到系统可能是 NAS 系统。"
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echo "此脚本不适用于 NAS 系统，继续执行可能导致系统损坏！"
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exit 1
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fi
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# 检查是否以 root 身份运行
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if [ "$EUID" -ne 0 ]; then
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echo "请使用 sudo 或以 root 身份运行此脚本。"
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exit 1
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fi
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echo "=============================="
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echo " Linux 系统清理脚本 "
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echo "=============================="
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# 1. 显示系统信息
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echo ""
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echo "系统信息："
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# 获取当前 Linux 发行版
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if [ -f /etc/os-release ]; then
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. /etc/os-release
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distro=$NAME
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else
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distro=$(uname -s)
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fi
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echo "操作系统：$distro"
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# 获取登录的用户名
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username=$(logname)
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echo "登录用户名：$username"
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# 获取 CPU 数量
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cpu_count=$(nproc)
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echo "CPU 数量：$cpu_count"
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# 获取内存大小和使用率
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total_mem=$(free -h | awk '/Mem:/ {print $2}')
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used_mem=$(free -h | awk '/Mem:/ {print $3}')
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mem_usage=$(free | awk '/Mem:/ {printf("%.2f"), $3/$2 * 100}')
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echo "内存大小：$total_mem"
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echo "已用内存：$used_mem ($mem_usage%)"
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# 获取硬盘大小和使用率
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disk_total=$(df -h / | awk 'NR==2 {print $2}')
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disk_used=$(df -h / | awk 'NR==2 {print $3}')
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disk_usage=$(df -h / | awk 'NR==2 {print $5}')
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echo "硬盘总容量：$disk_total"
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echo "已用硬盘：$disk_used ($disk_usage)"
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echo "=============================="
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# 2. 清理旧的内核包和残留的配置文件
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echo ""
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echo "步骤 1：清理旧的内核包和残留的配置文件"
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# 获取当前正在运行的内核版本
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current_kernel=$(uname -r)
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echo "当前正在运行的内核版本：$current_kernel"
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# 获取已安装的内核包列表
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installed_kernels=$(dpkg --list | grep 'linux-image-[0-9]' | awk '/^ii/{print $2}')
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echo "已安装的内核包："
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echo "$installed_kernels"
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# 初始化要移除的内核包列表
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remove_kernels=()
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# 筛选需要移除的旧内核包
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for kernel in $installed_kernels; do
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if [[ "$kernel" != *"$current_kernel"* ]]; then
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remove_kernels+=("$kernel")
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fi
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done
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# 显示将要移除的内核包
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if [ ${#remove_kernels[@]} -eq 0 ]; then
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echo "没有需要移除的旧内核。"
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else
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echo "将要移除的旧内核包："
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for kernel in "${remove_kernels[@]}"; do
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echo "$kernel"
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done
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read -p "是否确认移除以上内核包？[y/N]: " confirm
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if [[ "$confirm" =~ ^[Yy]$ ]]; then
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echo "正在移除旧内核包..."
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apt remove --purge -y "${remove_kernels[@]}"
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echo "自动清理不需要的依赖项..."
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apt autoremove --purge -y
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echo "更新 GRUB 引导菜单..."
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update-grub
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echo "旧内核包已成功移除。"
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else
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echo "已跳过旧内核包的清理。"
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fi
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fi
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echo "正在清理残留的配置文件..."
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dpkg -l | awk '/^rc/{print $2}' | xargs dpkg --purge
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echo "残留的配置文件已清理。"
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# 3. 清理 /tmp 目录
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echo ""
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echo "步骤 2：清理 /tmp 目录下的临时文件"
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read -p "是否清理 /tmp 目录下的所有文件（NAS系统请勿执行！！！）？[y/N]: " confirm_tmp
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if [[ "$confirm_tmp" =~ ^[Yy]$ ]]; then
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echo "正在清理 /tmp 目录..."
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rm -rf /tmp/*
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echo "/tmp 目录已清理。"
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else
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echo "已跳过 /tmp 目录的清理。"
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fi
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# 4. 清理 APT 缓存
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echo ""
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echo "步骤 3：清理 APT 缓存目录 /var/cache/apt/archives"
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apt_cache_size=$(du -sh /var/cache/apt/archives | awk '{print $1}')
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echo "APT 缓存当前占用空间：$apt_cache_size"
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read -p "是否清理 APT 缓存？这将删除已下载的包文件。[y/N]: " confirm_apt
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if [[ "$confirm_apt" =~ ^[Yy]$ ]]; then
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echo "正在清理 APT 缓存..."
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apt clean
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echo "APT 缓存已清理。"
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else
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echo "已跳过 APT 缓存的清理。"
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fi
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# 5. 清理用户缓存
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echo ""
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echo "步骤 4：清理用户缓存目录 ~/.cache"
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user_home=$(eval echo "~$SUDO_USER")
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user_cache_size=$(du -sh "$user_home/.cache" 2>/dev/null | awk '{print $1}')
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echo "用户缓存目录当前占用空间：$user_cache_size"
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read -p "是否清理用户缓存目录 ~/.cache？[y/N]: " confirm_user_cache
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if [[ "$confirm_user_cache" =~ ^[Yy]$ ]]; then
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echo "正在清理用户缓存目录..."
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rm -rf "$user_home/.cache/*"
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echo "用户缓存目录已清理。"
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else
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echo "已跳过用户缓存目录的清理。"
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fi
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# 6. 清理 systemd 日志
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echo ""
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echo "步骤 5：清理 systemd 日志 /var/log/journal"
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journal_size=$(du -sh /var/log/journal 2>/dev/null | awk '{print $1}')
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echo "systemd 日志当前占用空间：$journal_size"
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if [ -d "/var/log/journal" ]; then
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read -p "是否清理 systemd 日志？[y/N]: " confirm_journal
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if [[ "$confirm_journal" =~ ^[Yy]$ ]]; then
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echo "请输入要保留的日志大小（例如：100M，1G）："
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read -p "保留大小： " journal_limit
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echo "正在清理 systemd 日志，保留大小为 $journal_limit..."
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journalctl --vacuum-size="$journal_limit"
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echo "systemd 日志已清理。"
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else
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echo "已跳过 systemd 日志的清理。"
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fi
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else
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echo "未找到 /var/log/journal 目录，可能未启用持久化日志。"
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fi
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echo ""
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echo "✅ 系统清理完成！"
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echo "=============================="
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