# 备份规划要点
1. 数据盘点
– 列出所有需要备份的数据
– 确定数据的重要性和优先级
– 评估数据量和备份时间

2. 备份介质选择
– 本地磁盘：速度快，风险高
– 网络存储：安全性高，速度中等
– 云存储：异地备份，成本考虑

3. 备份时间安排
– 选择业务低峰期
– 预留足够的备份时间
– 考虑备份验证时间

4. 备份验证
– 验证备份文件完整性
– 测试备份数据可恢复性
– 记录备份信息

# 备份前准备工作
1. 确认备份存储空间充足
2. 准备备份介质和工具
3. 通知相关人员
4. 记录当前系统状态

# 查看可用的备份工具
# rpm -qa | grep -E “tar|rsync|cpio”
tar-1.34-2.el10.x86_64
rsync-3.2.3-12.el10.x86_64
cpio-2.13-12.el10.x86_64

# 安装备份工具
# dnf install -y rsync tar cpio
Package rsync-3.2.3-12.el10.x86_64 is already installed.
Package tar-1.34-2.el10.x86_64 is already installed.
Package cpio-2.13-12.el10.x86_64 is already installed.

# 常用备份工具对比
工具 | 优点 | 缺点
———–|——————————|——————
tar | 简单易用，支持压缩 | 不支持增量备份
rsync | 增量备份，远程同步 | 需要网络连接
cpio | 支持特殊文件 | 命令复杂
dd | 磁盘级备份 | 备份文件大

# 备份验证方法
1. 文件完整性验证
– 使用md5sum/sha256sum校验
– 比较文件数量和大小
– 检查备份文件权限

2. 内容验证
– 抽查部分文件内容
– 验证关键配置文件
– 检查数据库备份文件

3. 恢复测试
– 在测试环境恢复备份
– 验证恢复数据的可用性
– 记录恢复时间

# 备份验证命令示例
# 生成校验文件
md5sum backup.tar.gz > backup.tar.gz.md5

# 验证校验文件
md5sum -c backup.tar.gz.md5
backup.tar.gz: OK

# 查看备份文件内容
tar -tzf backup.tar.gz | head -20

# 统计备份文件数量
tar -tzf backup.tar.gz | wc -l
12345

# 创建备份目录
# mkdir -p /backup/pre-reinstall-$(date +%Y%m%d)
# BACKUP_DIR=”/backup/pre-reinstall-$(date +%Y%m%d)”

# 备份/etc目录（系统配置文件）
# tar -czf $BACKUP_DIR/etc-backup.tar.gz /etc/
tar: Removing leading `/’ from member names

# 查看备份文件
# ls -lh $BACKUP_DIR/etc-backup.tar.gz
-rw-r–r– 1 root root 12M Apr 2 14:00 /backup/pre-reinstall-20260402/etc-backup.tar.gz

# 备份已安装软件包列表
# rpm -qa > $BACKUP_DIR/installed-packages.txt

# 查看已安装软件包数量
# wc -l $BACKUP_DIR/installed-packages.txt
1234 /backup/pre-reinstall-20260402/installed-packages.txt

# 备份服务状态
# systemctl list-unit-files –type=service > $BACKUP_DIR/service-status.txt

# 备份已启用服务列表
# systemctl list-unit-files –type=service –state=enabled > $BACKUP_DIR/enabled-services.txt

# 备份防火墙规则
# firewall-cmd –list-all > $BACKUP_DIR/firewall-rules.txt

# 备份SELinux配置
# getenforce > $BACKUP_DIR/selinux-status.txt

# 备份用户和组信息
# cat /etc/passwd > $BACKUP_DIR/passwd.txt
# cat /etc/shadow > $BACKUP_DIR/shadow.txt
# cat /etc/group > $BACKUP_DIR/group.txt

# 备份SSH密钥
# tar -czf $BACKUP_DIR/ssh-keys.tar.gz /root/.ssh/ /home/*/.ssh/
tar: Removing leading `/’ from member names

# 备份/home目录（用户数据）
# tar -czf $BACKUP_DIR/home-backup.tar.gz /home/
tar: Removing leading `/’ from member names

# 查看备份文件大小
# ls -lh $BACKUP_DIR/home-backup.tar.gz
-rw-r–r– 1 root root 5.0G Apr 2 14:30 /backup/pre-reinstall-20260402/home-backup.tar.gz

# 备份/root目录
# tar -czf $BACKUP_DIR/root-backup.tar.gz /root/
tar: Removing leading `/’ from member names

# 备份数据库（以MySQL为例）
# mysqldump -u root -p –all-databases > $BACKUP_DIR/mysql-all-databases.sql
Enter password:

# 备份指定数据库
# mysqldump -u root -p fgedudb > $BACKUP_DIR/fgedudb.sql
Enter password:

# 备份Web服务器数据
# tar -czf $BACKUP_DIR/www-backup.tar.gz /var/www/html/

# 备份日志文件
# tar -czf $BACKUP_DIR/logs-backup.tar.gz /var/log/

# 使用rsync同步数据到远程服务器
# rsync -avz –progress /backup/pre-reinstall-20260402/ root@backup-server:/backup/rhel10-server/
sending incremental file list
./
etc-backup.tar.gz
12,345,678 100% 10.00MB/s 0:00:01 (xfr#1, to-chk=18/20)
home-backup.tar.gz
5,368,709,120 100% 50.00MB/s 0:01:43 (xfr#2, to-chk=17/20)

sent 5,504,678,912 bytes received 1,234 bytes 3,200,000.00 bytes/sec
total size is 5,504,678,912 speedup is 1.00

# 备份磁盘分区信息
# fdisk -l > $BACKUP_DIR/disk-partitions.txt
# lsblk > $BACKUP_DIR/disk-lsblk.txt

# 备份LVM配置
# vgdisplay > $BACKUP_DIR/lvm-vgdisplay.txt
# lvdisplay > $BACKUP_DIR/lvm-lvdisplay.txt
# pvdisplay > $BACKUP_DIR/lvm-pvdisplay.txt

# 备份文件系统挂载信息
# cat /etc/fstab > $BACKUP_DIR/fstab.txt
# mount > $BACKUP_DIR/mount-info.txt
# df -h > $BACKUP_DIR/disk-usage.txt

# 备份网络配置
# ip addr show > $BACKUP_DIR/network-interfaces.txt
# ip route show > $BACKUP_DIR/network-routes.txt
# cat /etc/resolv.conf > $BACKUP_DIR/resolv.conf.txt
# cat /etc/hosts > $BACKUP_DIR/hosts.txt

# 备份内核模块信息
# lsmod > $BACKUP_DIR/kernel-modules.txt

# 备份内核参数
# sysctl -a > $BACKUP_DIR/kernel-params.txt

# 生成备份清单
# cd $BACKUP_DIR
# find . -type f -exec md5sum {} \; > md5sums.txt

# 生成备份报告
# cat > $BACKUP_DIR/backup-report.txt << EOF 备份报告 ======== 备份时间: $(date) 备份目录: $BACKUP_DIR 备份主机: $(hostname) 系统版本: $(cat /etc/redhat-release) 内核版本: $(uname -r) 备份文件列表: $(ls -lh $BACKUP_DIR) 备份总大小: $(du -sh $BACKUP_DIR) EOF # 查看备份报告 # cat $BACKUP_DIR/backup-report.txt 备份报告 ======== 备份时间: Fri Apr 2 14:30:00 CST 2026 备份目录: /backup/pre-reinstall-20260402 备份主机: rhel10-server 系统版本: Red Hat Enterprise Linux release 10.0 (Plow) 内核版本: 5.14.0-123.el10.x86_64 备份文件列表: total 5.5G -rw-r--r-- 1 root root 12M Apr 2 14:00 etc-backup.tar.gz -rw-r--r-- 1 root root 5.0G Apr 2 14:30 home-backup.tar.gz -rw-r--r-- 1 root root 256M Apr 2 14:15 root-backup.tar.gz -rw-r--r-- 1 root root 64M Apr 2 14:20 www-backup.tar.gz -rw-r--r-- 1 root root 128M Apr 2 14:25 logs-backup.tar.gz -rw-r--r-- 1 root root 12K Apr 2 14:30 installed-packages.txt -rw-r--r-- 1 root root 4.0K Apr 2 14:30 service-status.txt -rw-r--r-- 1 root root 2.0K Apr 2 14:30 firewall-rules.txt 备份总大小: 5.5G /backup/pre-reinstall-20260402

# 创建完整备份脚本
# cat > /fgedu/shell/full-backup.sh << 'EOF' #!/bin/bash # from:www.itpux.com.qq113257174.wx:itpux-com BACKUP_DIR="/backup/full-backup-$(date +%Y%m%d-%H%M%S)" LOG_FILE="/var/log/backup-$(date +%Y%m%d).log" echo "========================================" | tee -a $LOG_FILE echo "开始完整系统备份" | tee -a $LOG_FILE echo "时间: $(date)" | tee -a $LOG_FILE echo "========================================" | tee -a $LOG_FILE mkdir -p $BACKUP_DIR echo "[1/10] 备份系统配置文件..." | tee -a $LOG_FILE tar -czf $BACKUP_DIR/etc-backup.tar.gz /etc/ 2>&1 | tee -a $LOG_FILE

echo “[2/10] 备份用户数据…” | tee -a $LOG_FILE
tar -czf $BACKUP_DIR/home-backup.tar.gz /home/ 2>&1 | tee -a $LOG_FILE

echo “[3/10] 备份root目录…” | tee -a $LOG_FILE
tar -czf $BACKUP_DIR/root-backup.tar.gz /root/ 2>&1 | tee -a $LOG_FILE

echo “[4/10] 备份已安装软件包列表…” | tee -a $LOG_FILE
rpm -qa > $BACKUP_DIR/installed-packages.txt 2>&1 | tee -a $LOG_FILE

echo “[5/10] 备份服务配置…” | tee -a $LOG_FILE
systemctl list-unit-files –type=service > $BACKUP_DIR/service-status.txt 2>&1 | tee -a $LOG_FILE

echo “[6/10] 备份网络配置…” | tee -a $LOG_FILE
ip addr show > $BACKUP_DIR/network-interfaces.txt 2>&1 | tee -a $LOG_FILE
ip route show > $BACKUP_DIR/network-routes.txt 2>&1 | tee -a $LOG_FILE

echo “[7/10] 备份磁盘信息…” | tee -a $LOG_FILE
fdisk -l > $BACKUP_DIR/disk-partitions.txt 2>&1 | tee -a $LOG_FILE
df -h > $BACKUP_DIR/disk-usage.txt 2>&1 | tee -a $LOG_FILE

echo “[8/10] 备份数据库…” | tee -a $LOG_FILE
mysqldump -u root -p –all-databases > $BACKUP_DIR/mysql-all-databases.sql 2>&1 | tee -a $LOG_FILE

echo “[9/10] 生成校验文件…” | tee -a $LOG_FILE
cd $BACKUP_DIR
find . -type f -exec md5sum {} \; > md5sums.txt 2>&1 | tee -a $LOG_FILE

echo “[10/10] 生成备份报告…” | tee -a $LOG_FILE
cat > $BACKUP_DIR/backup-report.txt << REPORT 完整备份报告 ============ 备份时间: $(date) 备份目录: $BACKUP_DIR 备份主机: $(hostname) 系统版本: $(cat /etc/redhat-release) 内核版本: $(uname -r) 备份文件列表: $(ls -lh $BACKUP_DIR) 备份总大小: $(du -sh $BACKUP_DIR) REPORT echo "========================================" | tee -a $LOG_FILE echo "备份完成！" | tee -a $LOG_FILE echo "备份位置: $BACKUP_DIR" | tee -a $LOG_FILE echo "备份大小: $(du -sh $BACKUP_DIR | awk '{print $1}')" | tee -a $LOG_FILE echo "========================================" | tee -a $LOG_FILE EOF # 执行备份脚本 # chmod +x /fgedu/shell/full-backup.sh # /fgedu/shell/full-backup.sh ======================================== 开始完整系统备份 时间: Fri Apr 2 14:00:00 CST 2026 ======================================== [1/10] 备份系统配置文件... [2/10] 备份用户数据... [3/10] 备份root目录... [4/10] 备份已安装软件包列表... [5/10] 备份服务配置... [6/10] 备份网络配置... [7/10] 备份磁盘信息... [8/10] 备份数据库... [9/10] 生成校验文件... [10/10] 生成备份报告... ======================================== 备份完成！ 备份位置: /backup/full-backup-20260402-140000 备份大小: 5.5G ========================================

# 在源服务器上准备迁移数据
# tar -czf /tmp/migration-data.tar.gz /backup/full-backup-20260402-140000/

# 使用scp传输到目标服务器
# scp /tmp/migration-data.tar.gz root@new-server:/tmp/
migration-data.tar.gz 100% 5504MB 50.0MB/s 01:50

# 在目标服务器上解压迁移数据
# ssh root@new-server
# cd /tmp
# tar -xzf migration-data.tar.gz

# 恢复配置文件
# cd /backup/full-backup-20260402-140000/
# tar -xzf etc-backup.tar.gz -C /restore/

# 恢复用户数据
# tar -xzf home-backup.tar.gz -C /restore/

# 恢复数据库
# mysql -u root -p < mysql-all-databases.sql Enter password: # 使用rsync进行增量迁移 # rsync -avz --delete /backup/full-backup-20260402-140000/ root@new-server:/backup/migration/ sending incremental file list ./ etc-backup.tar.gz 12,345,678 100% 10.00MB/s 0:00:01 (xfr#1, to-chk=18/20) home-backup.tar.gz 5,368,709,120 100% 50.00MB/s 0:01:43 (xfr#2, to-chk=17/20) sent 5,504,678,912 bytes received 1,234 bytes 3,200,000.00 bytes/sec total size is 5,504,678,912 speedup is 1.00

# 验证备份文件完整性
# cd /backup/full-backup-20260402-140000/
# md5sum -c md5sums.txt
./etc-backup.tar.gz: OK
./home-backup.tar.gz: OK
./root-backup.tar.gz: OK
./installed-packages.txt: OK
./service-status.txt: OK

# 查看备份文件内容
# tar -tzf etc-backup.tar.gz | head -20
etc/
etc/fstab
etc/crypttab
etc/mtab
etc/resolv.conf
etc/hostname
etc/hosts
etc/localtime
etc/machine-id
etc/os-release
etc/redhat-release
etc/adjtime
etc/shells
etc/profile
etc/bashrc

# 测试恢复单个文件
# mkdir -p /tmp/restore-test
# tar -xzf etc-backup.tar.gz -C /tmp/restore-test etc/passwd
# cat /tmp/restore-test/etc/passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

# 验证数据库备份
# head -50 mysql-all-databases.sql
— MySQL dump 10.13 Distrib 8.0.32, for Linux (x86_64)
—
— Host: localhost Database:
— ——————————————————
— Server version 8.0.32

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8mb4 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE=’+00:00′ */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE=’NO_AUTO_VALUE_ON_ZERO’ */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

— Current Database: `fgedudb`
—

CREATE DATABASE /*!32312 IF NOT EXISTS*/ `fgedudb` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci */;

USE `fgedudb`;

# 统计备份文件数量
# tar -tzf home-backup.tar.gz | wc -l
123456

# 检查备份文件权限
# ls -la
total 5504680
drwxr-xr-x 2 root root 4096 Apr 2 14:30 .
drwxr-xr-x 3 root root 4096 Apr 2 14:00 ..
-rw-r–r– 1 root root 12582912 Apr 2 14:00 etc-backup.tar.gz
-rw-r–r– 1 root root 5368709120 Apr 2 14:30 home-backup.tar.gz
-rw-r–r– 1 root root 268435456 Apr 2 14:15 root-backup.tar.gz
-rw-r–r– 1 root root 1234 Apr 2 14:30 installed-packages.txt
-rw-r–r– 1 root root 456 Apr 2 14:30 service-status.txt
-rw-r–r– 1 root root 789 Apr 2 14:30 md5sums.txt

# 备份迁移最佳实践
1. 备份前准备
– 制定详细的备份计划
– 确认备份存储空间充足
– 通知相关人员
– 记录系统当前状态

2. 备份执行
– 按优先级备份数据
– 使用压缩节省空间
– 生成校验文件
– 记录备份日志

3. 备份验证
– 验证文件完整性
– 测试恢复流程
– 检查数据可用性
– 记录验证结果

4. 备份存储
– 多地存储备份
– 定期检查备份状态
– 保留多个版本
– 加密敏感数据

5. 恢复测试
– 定期进行恢复演练
– 记录恢复时间
– 优化恢复流程
– 更新恢复文档

# 常用备份命令组合
# 快速备份关键数据
tar -czf backup-$(date +%Y%m%d).tar.gz /etc /home /root /var/www

# 使用rsync增量备份
rsync -avz –delete /data/ backup-server:/backup/data/

# 远程备份
ssh root@source-server “tar -czf – /data” | tar -xzf – -C /restore/

# 备份前检查清单
□ 1. 确认备份范围
– 系统配置文件
– 用户数据
– 应用数据
– 数据库

□ 2. 确认存储空间
df -h /backup

□ 3. 确认备份工具
rpm -qa | grep -E “tar|rsync”

□ 4. 停止关键服务
systemctl stop httpd mariadb

□ 5. 备份配置文件
tar -czf etc-backup.tar.gz /etc

□ 6. 备份用户数据
tar -czf home-backup.tar.gz /home

□ 7. 备份数据库
mysqldump –all-databases > db-backup.sql

□ 8. 备份应用数据
tar -czf app-backup.tar.gz /var/www

□ 9. 生成校验文件
md5sum *.tar.gz > md5sums.txt

□ 10. 验证备份完整性
md5sum -c md5sums.txt

□ 11. 记录备份信息
创建备份报告

□ 12. 传输到备份服务器
rsync -avz /backup/ backup-server:/backup/

□ 13. 验证远程备份
ssh backup-server “ls -lh /backup/”

□ 14. 启动关键服务
systemctl start mariadb httpd

□ 15. 记录备份完成时间
记录到备份日志

# 推荐的备份工具
1. tar
– 系统自带，简单易用
– 支持压缩和归档
– 适合文件级备份

2. rsync
– 增量备份，节省空间
– 支持远程同步
– 适合大规模数据

3. dd
– 磁盘级备份
– 完整克隆磁盘
– 适合系统迁移

4. Bacula
– 企业级备份解决方案
– 支持网络备份
– 功能全面

5. Amanda
– 开源备份系统
– 支持多种介质
– 适合大型环境

# 安装Bacula示例
# dnf install -y bacula-server bacula-client

# 安装Amanda示例
# dnf install -y amanda-server amanda-client

# 使用dd备份磁盘
# dd if=/dev/sda of=/backup/disk-image.img bs=4M status=progress
2621440000 bytes (2.6 GB) copied, 60.000 s, 43.7 MB/s

# 使用dd恢复磁盘
# dd if=/backup/disk-image.img of=/dev/sda bs=4M status=progress