抽空制作的一个取前一月份和后一月份脚本
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#!/bin/bashusage(){ echo
"Usage: $0 201401" exit
0}if
[ x$1 == x ];then usagefi year=`echo
$1|cut
-c 1-4`month=`echo
$1|cut
-c 5-6`next_month(){ if
[ $2 == 12 ];then l_month=‘01‘ l_year=`expr
$1 + 1` echo
"$l_year$l_month" elif
[ $2 -lt 9 ];then l_year=$1 l_month=`expr
$2 + 1` l_month="0$l_month" echo
"$l_year$l_month" else l_year=$1 l_month=`expr
$2 + 1` echo
"$l_year$l_month" fi}pre_month(){ if
[ $2 -eq
1 ];then l_month=12 l_year=`expr
$1 - 1` echo
"$l_year$l_month" elif
[ $2 -gt 10 ];then l_month=`expr
$2 - 1` l_year=$1 echo
"$l_year$l_month" else l_month=`expr
$2 - 1` l_month="0$l_month" l_year=$1 echo
"$l_year$l_month" fi} echo
"cur_month is $1"l_next_month=`next_month $year $month`l_pre_month=`pre_month $year $month`echo
"next month is $l_next_month"echo
"pre month is $l_pre_month" |
原文：http://www.cnblogs.com/bowshy/p/3538130.html