shell 定时备份mysql数据表。
直接上代码。
#!/bin/sh
# config information 定义数据库连接
db_host=localhost
db_port=3306
db_username=root
db_password=root
db_name=backup
backup_dir="/opt/backup/"
if [ ! -d "$backup_dir" ];then
mkdir "$backup_dir"
fi
today=`date "+%Y%m%d%H"`
# 定义需要备份的数据库表数组
backup_tables=(t_user t_role t_application t_user_role )
echo "================ begining backup basic data ================="
cd $backup_dir
# 遍历备份的数据库表
for t in ${backup_tables[@]};
do
backup_file="${t}_${today}.sql"
if [ ! -e "$backup_file" ];then
rm -f "$backup_file"
fi
# 最核心的就是这句话，使用mysqldump命令执行备份
mysqldump -h${db_host} -u $db_username -p${db_password} $db_name $t
> $backup_dir/$backup_file
done
finish_date=`date '+%Y-%m-%d %H:%M:%S'`
echo "The basic information tables backup successfully completed at ${finish_date}."
three_days_ago=`date -d "3 days ago" +%Y%m%d`
# 反向删除
find $backup_dir -name "*${three_days_ago}*.sql"|grep -v "${three_days_ago}00.sql" | xargs -i rm -f {}