1 项目备份      变量的形式 定时任务不执行就都写成了绝对路径

#!/bin/bash
# 
# 项目路径 /usr/local/tomcat-bjkjdx            备份文件路径/usr/local/bak
#BACKUP_BASE=/usr/local
#/user/local/bak
#BACKUP_HOME=$BACKUP_BASE/bak
#判断是都存在bak文件自动创建
if [ ! -d /usr/local/bak  ];then
mkdir -p  /usr/local/bak
echo "已创建目录正在执行备份"
else
echo "正在执行应用备份"
fi
cd /usr/local/bak; tar -zcvf tomcat7_`date +%F`.tar.gz --exclude=*tar --exclude=*gz --exclude=*zip --exclude=*bak --exclude=logs   /usr/local/tomcat7
#Remove more than 90 days before the backup
find /usr/local/bak -mtime +90 -type f -exec rm {} \;

vim /etc/crontab

SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

# For details see man 4 crontabs

# Example of job definition:
# .---------------- minute (0 - 59)
# | .------------- hour (0 - 23)
# | | .---------- day of month (1 - 31)
# | | | .------- month (1 - 12) OR jan,feb,mar,apr ...
# | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# | | | | |
# * * * * * user-name command to be executed
44 13 * * * /home/oracle/back/oracle_back.sh

crontab  /etc/crontab

crontab -l      检查是否备份

2 oracle 备份

DATE=$(date '+%Y%m%d%H%M%S')
su - oracle -c " expdp username/password@orcl   directory=dum dumpfile=username_$DATE.dmp logfile=username_$DATE.log full=y" 
cd /home/oracle/back/ 

tar zcvf username_$DATE.tar.gz username_$DATE.* 

find /home/oracle/back/ -mtime +90 -name "*.dmp" -exec rm -rf {} \; 
find /home/oracle/back/ -mtime +90 -name "*.log" -exec rm -rf {} \; 
find /home/oracle/back/ -mtime +180 -name "*.tar.gz" -exec rm -rf {} \;