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要求：
打包压缩/var/log/nginx目录下所有内容,存放在/tmp/nginx目录里
压缩文件命名规范:yymmdd_logs.tar.gz,只保存七天内的文件,超过七天的文件会进行清理
```
#!bin/bash
date="$(date +%Y%m%d)"
dir='/tmp/nginx'
backupfile='yymmdd_logs.tar.gz'
#查看/tmp/nginx是否存在,不存在则创建
checkbak(){
if [ ! -e ${dir} ]
then
mkdir ${dir}
fi
}
#压缩文件
backup(){
tar -zcvf ${dir}/${backupfile} /var/log/nginx/ > /dev/null 2>&1
echo "${backupfile} Compressed and packaged successfully !"
}
#清除七天过期文件
cleanup(){
find ${dir} -type f -mtime +7 | xagrs rm -rf
if [ $? -eq 0 ]
then
echo "Cleaned up successfully！
else
echo "data cleaning failed error, please pay attention in time"
fi
}
checkbak
backup
```
