autodel自动化删除日志文件脚本

• autodel.sh脚本使用说明
  功能描述
  自动删除过期的日志文件，具体删除天数，可以在脚本中" if((LogDay+3 < NowGetDay))"行进行修改；
  日志格式类似：2010-5-12-12-59-44.txt
  技术点：
   @获取年月日数字
  NowGetDay=`date +%d`
  NowGetMonth=`date +%m`
  NowGetYear=`date +%Y`
   @字符串与数字转换
  NowGetDay=`expr ${NowGetDay} + 0`
  加号操作符两边必须是空格
   @字符串的分割和截取
  LogYear=`expr ${LogFileName#*"./"} |cut -d "-" -f1`
  把"./"去掉，然后通过"-"进行分割，其中LogFileName为./2010-5-12-12-59-44.txt

#! /bin/bash
###################################
#File Name	: autodel.sh
#Version Number	: 1.0/0.0
#Describtion	: remove log files beyond some days automatically,and the format of log file is like "2010-5-12-12-12-12.txt"
#Author		: LiWei
#Date		: 2010-5-12
#Change Log	:
#               $$$Revision 0.9,2010-5-12 by LiWei
#                  Set 3 days the period to remove log files automatically
#		$$$Revision 0.8,2010-5-11 by LiWei
#		   Get original version
###################################
NowGetDay=`date +%d`
NowGetDay=`expr ${NowGetDay} + 0` #insure space on both sides of plus operator
NowGetMonth=`date +%m`
NowGetMonth=`expr ${NowGetMonth} + 0`
NowGetYear=`date +%Y`
NowGetYear=`expr ${NowGetYear} + 0`
echo "NowGetDay="${NowGetDay}
echo "NowGetMonth="${NowGetMonth}
echo "NowGetYear="${NowGetYear}
echo
for LogFileName in `find ./ -name "*-*-*-*.txt"`
do
echo "LogFileName="${LogFileName}
#split LogFileName string with "-" char ,then intercept the first row to get specific year number by removing "./" string,at last save the specific year number in LogYear
LogYear=`expr ${LogFileName#*"./"} |cut -d "-" -f1` 
#intercept the second row to get specific month saved in LogMonth
LogMonth=`expr ${LogFileName} | cut -d "-" -f2`
#intercept the third row to get specific day saved in LogDay
LogDay=`expr ${LogFileName} |cut -d "-" -f3`
echo "LogYear="${LogYear}
echo "LogMonth="${LogMonth}
echo "LogDay="${LogDay}

   if((LogYear < NowGetYear))
   then
   rm -f ${LogFileName}
   echo "LogYear "${LogYear}"<"${NowGetYear}
   echo "rm "${LogFileName}" succeed!"
   echo
   continue
   fi
   
   if((LogMonth < NowGetMonth))
   then
   rm -f ${LogFileName}
   echo "LogMonth "${LogMonth}"<"${NowGetMonth}
   echo "rm "${LogFileName}" succeed!"
   echo
   continue
   fi

   if((LogDay+3 < NowGetDay))  #rm log files with date beyond three days
   then
   rm -f ${LogFileName}
   echo "LogDay+3 "`expr ${LogDay} + 3`"<"${NowGetDay}
   echo "rm "${LogFileName}" succeed!"
   echo
   continue
   fi
echo
done