一.实现ssh 远程登陆

机器环境:

192.167.33.108 clent 用户:crawler

192.167.33.77 server 用户:crawler

1.客户端 生成密钥

/home/crawler/.ssh/ssh-keygen

2. 查看密钥文件权限

ls -ld ~/.ssh; ls -l ~/.ssh

3.修改文件权限

chmod 700 /home/crawler/.ssh

chmod 600 /home/crawler/.ssh/id_rsa

4.复制公钥到服务器端

scp -r /home/crawler/.ssh/id_rsa.pub crawler@192.167.33.77:/home/crawler/.ssh

5.服务器端设置公钥

ls -ld /home/crawler/.ssh 查看文件权限 
chmod 700 /home/crawler/.ssh 需要是drwx
ls -l /home/crawler/.ssh/*pub 查看是否有公钥
cat /home/crawler/.ssh/id_rsa.pub >> /home/crawler/.ssh/authorized_keys //生成公钥最好用这种方式避免替换掉之前的公钥
chmod 644 /home/crawler/.ssh/authorized_keys //修改权限
ls -l /home/crawler/.ssh // 查看权限

6.ssh crawler@192.167.33.47 登陆成功

二、备份mysql数据库

1.备份脚本(每天凌晨3点30开始备份,只保留7天的备份数据)

30 03 * * * sh /home/crawler/mysql_back_up/script/mysql-backup.sh gquan_miss8

rq=` date +%Y%m%d `

echo backuping $1

mysqldump -uroot -p111111 --default-character-set=utf8 --opt  --triggers -R --hex-blob --single-transaction  $1 | gzip > /home/crawler/mysql_back_up/daily/$1-all-$rq.sql.gz

find  /home/crawler/mysql_back_up/daily  -mtime +7 -name "*.sql.gz"  -exec  rm -rf {} \;

echo finished backup $1

2.rsync实现远程备份数据增量同步(每天凌晨5点10分执行)

10 05 * * * sh /home/crawler/mysql_back_up/script/back_mysql_77.sh >> /home/crawler/mysql_back_up/script/back.log

#!/bin/sh
echo "------------------------start--------------"`date`
rsync -au --delete /home/crawler/mysql_back_up/daily/ crawler@192.168.32.77:/home/crawler/back_96_data
echo "------------------------over--------------"`date

3.测试查看服务器上面有client文件说明正确

server图片

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" 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client 图片

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