shell日期格式Demo_linux shell 判断日期格式

一、shell校验日期格式是否合法:

1. 简单实用长度判断

#!/bin/bash
dt="$1"
echo "dt is: $dt"
len_dt=${#dt}
echo "len dt is: $len_dt"
trim_dt=${dt//-/}
echo "trim_dt is $trim_dt"
len_trim_dt=${#trim_dt}
echo "len_trim_dt is $len_trim_dt"
len_dur=`echo $(($len_dt-$len_trim_dt))`
echo "len_dur is $len_dur"
 
if [ 2 -eq $len_dur  ]
then
        echo "eq 2"
        dt=`date -d "$dt" +"%Y-%m-%d"`
        echo $?
else
        echo "not eq"
fi

二、月初执行脚本

#!/bin/bash
 
start_dt=$1
end_dt=$2
 
#echo "day id : "${start_dt:8:2}
 
while [ "${start_dt}" != "`date -d "${end_dt} +1 day" +"%Y-%m-%d"`" ]
do
        if [ ${start_dt:8:2} = 01 ];
        then
               echo ${start_dt} "do business here"
        fi
        start_dt=`date -d "${start_dt} +1 day" +"%Y-%m-%d"`
done
 
echo "=========>>>>>>>> exit with $?"