1、create directory

!/bin/bash

for i in {1..12}
do
for y in {1..31}
do

    if ((i < 10));then
        if ((y < 10));then
            mkdir -p /opt/logs/2020-0$i-0$y
        else
            mkdir -p /opt/logs/2020-0$i-$y
        fi
    else
        if ((y < 10));then
            mkdir -p /opt/logs/2020-$i-0$y
        else
            mkdir -p /opt/logs/2020-$i-$y
        fi
    fi
done

done
which looked like below

image.png

2、delete file

!/bin/bash

delete file of specifical directory and left only one month file

get current month

month=date +"%m"

remove 0 if month < 10

if (({month:1:1}
fi

iterator the specifical directory

for i in ls $1
do

rm=${i:5:2}
if ((${rm:0:1} == 0));then
    rm=${rm:1:1}
fi
if ((rm > month));then
    rm -f $1/$i/*
fi

done

image.png
image.png