Linux 定时执行备份任务

本地搭建一个 dokuwiki 服务器,考虑备份需求,每天备份服务器内容到另一台设备。

  • 服务器 IP:172.168.111.192
  • 备份设备 IP:192.168.204.168

通过 cron 命令进行定时任务执行。

前期工作

见本博客另一篇文章 如何让 scp / ssh 不需要密码

实现备份的脚本

在服务器 172.168.111.192 上实现备份脚本。

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root@ubuntu:~# cat dokuwiki.backup.sh 
#!/bin/bash

backpath=/var/www/backup
date=`date +%y%m%d`
site='dokuwiki'
tar zcf ${backpath}${site}"-"${date}.tar.gz /var/www/${site}
scp ${backpath}${site}"-"${date}.tar.gz sunyongfeng@192.168.204.168:/home/sunyongfeng/backup/${site}"-"${date}.tar.gz
root@ubuntu:~#

cron 配置

在服务器 172.168.111192 上每天 4:30 执行备份脚本。

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root@ubuntu:~# export EDITOR=vim 
root@ubuntu:~# crontab -e
no crontab for root - using an empty one
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h dom mon dow command
30 04 * * * /root/dokuwiki.backup.sh

首次选择 cron 编辑器不小心选择了 nano,不懂怎么用。通过 export EDITOR=vim 将编辑器切成 vim。

效果

备份机器 192.168.204.168 上的效果:

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sunyongfeng@openswitch-OptiPlex-380:~/backup$ ls -al
total 8759824
drwxrwxrwx 7 sunyongfeng sunyongfeng 4096 5月 31 04:30 .
drwxr-xr-x 44 sunyongfeng sunyongfeng 4096 5月 31 09:24 ..
-rw-r--r-- 1 sunyongfeng sunyongfeng 30790523 4月 18 20:26 dokuwiki-170418.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30829080 4月 25 14:14 dokuwiki-170425.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30829128 4月 26 04:31 dokuwiki-170426.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30840695 4月 27 04:31 dokuwiki-170427.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30878801 4月 28 04:31 dokuwiki-170428.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30878561 4月 29 04:31 dokuwiki-170429.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30878561 4月 30 04:31 dokuwiki-170430.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30878561 5月 1 04:31 dokuwiki-170501.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30878561 5月 2 04:31 dokuwiki-170502.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 30925192 5月 3 04:31 dokuwiki-170503.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31827534 5月 4 04:31 dokuwiki-170504.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31830576 5月 5 04:31 dokuwiki-170505.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31830576 5月 6 04:31 dokuwiki-170506.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31830576 5月 7 04:32 dokuwiki-170507.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31830576 5月 8 04:31 dokuwiki-170508.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832468 5月 9 04:31 dokuwiki-170509.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832468 5月 10 04:31 dokuwiki-170510.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833486 5月 11 04:31 dokuwiki-170511.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31834472 5月 12 04:31 dokuwiki-170512.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833802 5月 13 04:31 dokuwiki-170513.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833802 5月 14 04:31 dokuwiki-170514.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31835188 5月 15 04:31 dokuwiki-170515.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31835398 5月 16 04:30 dokuwiki-170516.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31834919 5月 17 04:30 dokuwiki-170517.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31834919 5月 18 04:30 dokuwiki-170518.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 19 04:30 dokuwiki-170519.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 20 04:30 dokuwiki-170520.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 21 04:30 dokuwiki-170521.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 22 04:30 dokuwiki-170522.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 23 04:30 dokuwiki-170523.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31832950 5月 24 04:30 dokuwiki-170524.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833337 5月 25 04:30 dokuwiki-170525.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833232 5月 26 04:30 dokuwiki-170526.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833446 5月 27 04:30 dokuwiki-170527.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31833446 5月 28 04:30 dokuwiki-170528.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31835384 5月 29 04:30 dokuwiki-170529.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31835403 5月 30 04:30 dokuwiki-170530.tar.gz
-rw-r--r-- 1 sunyongfeng sunyongfeng 31835403 5月 31 04:30 dokuwiki-170531.tar.gz