How to realize the last day judgment of each month by SHELL script

This article mainly introduces the SHELL script how to achieve the last day of each month judgment, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

#! / bin/bash

# function definition

Function monBigorSmall ()

{

Big_month= (1 3 5 7 8 10 12)

Small_month= (4 6 9 11)

Year=$ (echo $1 | cut-c 1-4)

Month=$ (echo $1 | cut-c 5-6)

Day=$ (echo $1 | cut-c 7-8)

For bvar in ${big_month [@]}

Do

If [$bvar-eq $month]

Then

Echo 31

Fi

Done

For svar in ${small_month [@]}

Do

If [$svar-eq $month]

Then

Echo 30

Fi

Done

Iyear=$ ((10 million ${year}))

Imonth=$ ((10 million ${month}))

If [$imonth-eq 2]

Then

If [$(($iyear% 4))-eq 0-a $(($iyear% 100))-ne 0] | | [$(($iyear% 4))-eq 0]

Then

Echo 29

Else

Echo 28

Fi

Fi

}

#

Echo "#"

For ((ii=1;ii