场景:整库备份，用exp方式，按周循环，备份文件存在oracle下的db_backup目录，周一备份到成dbbackup_1.dmp，周二：dbbackup_2.dmp，周三：dbbackup_3.dmp，周四：dbbackup_4.dmp，周五：dbbackup_5.dmp，周六：dbbackup_6.dmp，周日：dbbackup_7.dmp，并且循环覆盖，服务器上只存7个备份文件
shell脚本：dbback.sh
#!/bin/sh day=`date +%w` if [ ${day} == "0" ]; then day="7" fi bakfile=/home/oracle/db_backup/dbbackup_${day}.dmp exp userid=system/manager file=${bakfile} full=yes
原文：http://www.cnblogs.com/zhabayi/p/6774941.html