105 lines
2.8 KiB
Bash
Executable File
105 lines
2.8 KiB
Bash
Executable File
#!/bin/bash
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# Swap空间扩展脚本
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# 将 /swapfile 从 8GB 扩展到 24GB
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set -e # 遇到错误立即退出
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echo "=========================================="
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echo "Swap空间扩展脚本"
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echo "=========================================="
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echo ""
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# 颜色定义
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GREEN='\033[0;32m'
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YELLOW='\033[1;33m'
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RED='\033[0;31m'
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NC='\033[0m' # No Color
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# 检查是否有sudo权限
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if ! sudo -n true 2>/dev/null; then
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echo -e "${YELLOW}此脚本需要sudo权限，请输入密码${NC}"
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fi
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echo "步骤 1/7: 显示当前swap状态"
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echo "----------------------------------------"
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swapon --show
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free -h
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echo ""
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read -p "确认要继续吗？这将临时关闭swap空间 (y/n): " -n 1 -r
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echo ""
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if [[ ! $REPLY =~ ^[Yy]$ ]]; then
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echo -e "${RED}操作已取消${NC}"
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exit 1
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fi
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echo ""
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echo "步骤 2/7: 关闭现有 /swapfile"
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echo "----------------------------------------"
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sudo swapoff /swapfile
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echo -e "${GREEN}✓ 已关闭 /swapfile${NC}"
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echo ""
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echo "步骤 3/7: 删除旧的 swapfile"
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echo "----------------------------------------"
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sudo rm /swapfile
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echo -e "${GREEN}✓ 已删除旧文件${NC}"
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echo ""
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echo "步骤 4/7: 创建新的 24GB swapfile"
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echo "----------------------------------------"
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echo "使用 fallocate 快速创建（约需10-30秒）..."
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sudo fallocate -l 24G /swapfile
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echo -e "${GREEN}✓ 已创建 24GB swapfile${NC}"
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echo ""
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echo "步骤 5/7: 设置文件权限"
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echo "----------------------------------------"
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sudo chmod 600 /swapfile
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echo -e "${GREEN}✓ 权限已设置为 600${NC}"
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echo ""
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echo "步骤 6/7: 格式化为swap"
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echo "----------------------------------------"
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sudo mkswap /swapfile
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echo -e "${GREEN}✓ 格式化完成${NC}"
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echo ""
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echo "步骤 7/7: 启用新的swapfile"
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echo "----------------------------------------"
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sudo swapon /swapfile
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echo -e "${GREEN}✓ 已启用新的swapfile${NC}"
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echo ""
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echo "=========================================="
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echo "扩展完成！当前swap状态："
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echo "=========================================="
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swapon --show
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echo ""
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free -h
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echo ""
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# 检查 /etc/fstab 配置
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echo "----------------------------------------"
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echo "检查 /etc/fstab 配置..."
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echo "----------------------------------------"
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if grep -q "^/swapfile" /etc/fstab; then
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echo -e "${GREEN}✓ /etc/fstab 已包含 swapfile 配置${NC}"
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else
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echo -e "${YELLOW}⚠ /etc/fstab 中未找到 swapfile 配置${NC}"
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read -p "是否添加到 /etc/fstab 以确保重启后生效？(y/n): " -n 1 -r
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echo ""
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if [[ $REPLY =~ ^[Yy]$ ]]; then
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echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
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echo -e "${GREEN}✓ 已添加到 /etc/fstab${NC}"
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fi
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fi
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echo ""
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echo "=========================================="
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echo -e "${GREEN}所有操作完成！${NC}"
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echo "=========================================="
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echo "总Swap空间: ~31GB (24GB swapfile + 7.3GB zram)"
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echo ""
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