128 lines
3.6 KiB
Bash
128 lines
3.6 KiB
Bash
#!/bin/bash
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# Debian/Ubuntu 内核切换脚本
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# 功能：从 Cloud 内核切换到标准内核
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# 适用：Debian 11+/Ubuntu 18.04+
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RED='\033[0;31m'
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GREEN='\033[0;32m'
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YELLOW='\033[0;33m'
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NC='\033[0m'
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check_root() {
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if [ "$(id -u)" -ne 0 ]; then
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echo -e "${RED}错误：必须使用 root 权限运行此脚本${NC}"
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exit 1
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fi
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}
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check_cloud_kernel() {
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if ! uname -r | grep -q 'cloud'; then
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echo -e "${GREEN}提示：系统已在标准内核运行 ($(uname -r))${NC}"
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exit 0
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fi
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}
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purge_cloud_kernel() {
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echo -e "${YELLOW}步骤1/4：彻底移除 Cloud 内核...${NC}"
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# 找出所有 Cloud 内核包
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local cloud_pkgs=$(dpkg -l | awk '/linux-(image|headers)-[0-9].*cloud/ {print $2}')
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if [ -n "$cloud_pkgs" ]; then
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echo -e "正在卸载: ${cloud_pkgs}"
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apt purge -y $cloud_pkgs
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apt autoremove -y --purge
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else
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echo -e "${GREEN}提示：未找到 Cloud 内核包${NC}"
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fi
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}
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lock_cloud_kernel() {
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echo -e "${YELLOW}步骤2/4：锁定 Cloud 内核...${NC}"
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# 检查是否还有额外的 Cloud 内核包，如果有则标记为 hold
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cloud_kernels=$(apt list --installed 2>/dev/null | grep -i 'linux-image' | grep -i 'cloud' | cut -d'/' -f1)
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if [ -n "$cloud_kernels" ]; then
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echo "找到以下 Cloud 内核包，正在锁定：$cloud_kernels"
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apt-mark hold $cloud_kernels
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else
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echo -e "${GREEN}提示：未找到任何 Cloud 内核包，跳过锁定步骤。${NC}"
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fi
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}
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force_install_standard() {
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echo -e "${YELLOW}步骤3/4：安装标准内核...${NC}"
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# 根据系统类型选择包名
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local image_pkg="linux-image-amd64"
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local headers_pkg="linux-headers-amd64"
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if grep -q 'ID=ubuntu' /etc/os-release; then
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image_pkg="linux-image-generic"
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headers_pkg="linux-headers-generic"
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fi
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# 强制安装并跳过配置提问
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DEBIAN_FRONTEND=noninteractive apt install -y --reinstall --allow-downgrades \
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"$image_pkg" "$headers_pkg"
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# 确保 initramfs 更新
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local std_kernel=$(ls /boot/vmlinuz-* | grep -v cloud | sort -V | tail -1 | sed 's|/boot/vmlinuz-||')
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update-initramfs -u -k "$std_kernel"
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}
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nuclear_grub_update() {
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echo -e "${YELLOW}步骤4/4：重建 GRUB...${NC}"
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# 备份原配置
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mkdir -p /root/grub_backup
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cp -a /boot/grub /root/grub_backup/grub.bak.$(date +%s)
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# 生成干净的 GRUB 配置
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cat > /etc/default/grub <<'EOF'
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GRUB_DEFAULT=0
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GRUB_TIMEOUT=5
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GRUB_DISTRIBUTOR=lsb_release -i -s 2> /dev/null || echo Debian
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GRUB_CMDLINE_LINUX_DEFAULT="quiet"
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GRUB_CMDLINE_LINUX=""
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GRUB_DISABLE_OS_PROBER=true
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GRUB_DISABLE_RECOVERY=true
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EOF
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# 完全重建配置
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grub-mkconfig -o /boot/grub/grub.cfg
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# 确保使用第一个菜单项
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grub-set-default 0
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update-grub
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# 特殊处理 UEFI 系统
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if [ -d /sys/firmware/efi ]; then
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echo -e "检测到 UEFI 系统，更新引导加载程序..."
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grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=debian --recheck
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fi
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}
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main() {
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echo -e "\n${GREEN}=== Debian/Ubuntu 内核切换脚本 ===${NC}"
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check_root
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check_cloud_kernel
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# 执行核心修复步骤
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purge_cloud_kernel
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lock_cloud_kernel
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force_install_standard
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nuclear_grub_update
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# 最终验证
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echo -e "\n${GREEN}=== 操作完成 ===${NC}"
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echo -e "请手动重启系统："
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echo -e "1. 重启系统: ${YELLOW}reboot${NC}"
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echo -e "2. 检查内核: ${YELLOW}uname -r${NC}"
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touch /root/.kernel_switch_success
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}
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main "$@"
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