A place to hold mainly reading notes, and some technical stuff occasionally. 这里主要是一些读书笔记、感悟;还有部分技术相关的内容。
目录[-]
backupdb.sh
(这里在根目录下新建文件)db_user="root"
db_password="root"
db_name="demo"
backup_dir="/backup"
time="$(date +"%Y%m%d%H%M%S")"
mysqldump -u$db_user -p$db_password $db_name | gzip > $backup_dir/$db_name"_"$time.sql.gz
赋予其执行权限:chmod u+x backupdb.sh
;
若此时直接运行./backupdb.sh
,会出现警告:
mysqldump: [Warning] Using a password on the command line interface can be insecure.
为避免出现警告信息,可通过以下方式配置实现:
vi /etc/mysql/my.cnf
[mysqldump]
user=your_db_user_name
password=your_db_password
保存配置文件后, 再修改备份脚本,其中不需要再涉及用户名密码等信息。
db_name="demo"
backup_dir="/backup"
time="$(date +"%Y%m%d%H%M%S")"
mysqldump $db_name | gzip > $backup_dir/$db_name"_"$time.sql.gz
再次运行脚本,就没有警告信息了。
* * * * * *
- - - - - -
| | | | | |
| | | | | + year [optional]
| | | | +----- day of week (0 - 7) (Sunday=0 or 7)
| | | +---------- month (1 - 12)
| | +--------------- day of month (1 - 31)
| +-------------------- hour (0 - 23)
+------------------------- min (0 - 59)
# 建立计划并执行
crontab -e
# 通过vi或其他编辑器输入计划, eg: 每周日0点执行
0 0 * * 0 /backupdb.sh
# 查看已有任务
crontab -l
Note:
crontab -l
的结果为:”no crontab for root - using an empty one”,则说明任务建立失败;select-editor
选择编辑器。If you have any questions or any bugs are found, please feel free to contact me.
Your comments and suggestions are welcome!