shell脚本练习（6）：备份MySQL数据库表
一、脚本编写
编写脚本如下：
#!/bin/bash# 系统数据库
SYS_DB="information_schema|mysql|performance_schema|sys"# 需要备份的数据库
DB=`mysql -N -e "show databases" | egrep -v $SYS_DB`for i in $DB;do# 备份的路径BAK_PATH="/server/db/${i}"[ -d ${BAK_PATH} ] || mkdir -p ${BAK_PATH}# 备份数据库mysqldump -B $i > "${BAK_PATH}/${i}_`date +%F`.sql"# 数据库的表TB=`mysql -N -e "show tables from ${i}"`# 备份数据库的表for j in $TB;domysqldump $i $j > "${BAK_PATH}/${i}_${j}_`date +%F`.sql"donedone
二、输出结果
执行脚本后查看其目录结构：
[root@localhost ~]# tree /server/db/
/server/db/
├── company
│ ├── company_2025-05-15.sql
│ ├── company_admin_2025-05-15.sql
│ ├── company_dept_2025-05-15.sql
│ ├── company_emp_2025-05-15.sql
│ ├── company_form_2025-05-15.sql
│ └── company_product_2025-05-15.sql
├── goods
│ ├── goods_2025-05-15.sql
│ ├── goods_admin_2025-05-15.sql
│ ├── goods_form_2025-05-15.sql
│ └── goods_product_2025-05-15.sql
└── jiaowu├── jiaowu_2025-05-15.sql├── jiaowu_courses_2025-05-15.sql├── jiaowu_scores_2025-05-15.sql├── jiaowu_students_2025-05-15.sql└── jiaowu_tutors_2025-05-15.sql3 directories, 15 files
可以搭配计划任务实现定时备份数据库。