Linux Practical Task 1

#!/bin/bash

file="./current.tag.txt"
date=$(date +%y.%m.%d)

if [ ! -e "$file" ]; then
    touch current.tag.txt
    tag=1
    curr_tag=$(date +%y.%m.%d).$tag
    echo $curr_tag > current.tag.txt
else
    curr_tag=$(cat < current.tag.txt)
    curr_date=${curr_tag:0:8}
    tag=${curr_tag:9}
    if [ $curr_date == $date ]; then
        tag=$(($tag+1))
    else
        tag=1
    fi
fi

format_tag=`printf "%03d" $tag`
echo $date.$tag > current.tag.txt
echo $date.$format_tag