Bash backup checker

Question

I'm trying to compare dates from a file and the current day. The script should run every day and if the dates do not compare it should give a warning.

I made a test file with a 2015 date, but it keeps saying its "equal" to the current date.

#!/bin/bash

today= date +"%m-%d-%y"
filedate= date +"%m-%d-%y" -r fileName.txt

if [ $today == $filedate ];
then
echo $today;
echo $filedate;
echo 'Backup OK';
else
echo $today;
echo $filedate;
echo 'Backup ERROR';
fi

Using mm-dd-yy dates is never going to work properly. Switch to properly machine (and human!) readable yyyy-mm-dd dates; you will thank yourself many times over. — tripleee, Sep 05 '16 at 16:28

SLePort · Answer 1 · 2016-09-05T16:38:48.183

0

You can assign the date output to the today and filedate variables using command substitution. And you'd better double quote your variables in your comparison test:

today=$(date +"%m-%d-%y")
filedate=$(date +"%m-%d-%y" -r fileName.txt)

echo $today
echo $filedate
if [ "$today" == "$filedate" ];
then
echo $today;
echo $filedate;
echo 'Backup OK';
else
echo $today;
echo $filedate;
echo 'Backup ERROR';
fi

edited Sep 05 '16 at 16:38

answered Sep 05 '16 at 16:14

SLePort

15,211
3
34
44

Marco Silva · Answer 2 · 2016-09-05T16:33:02.710

0

find utility is your friend.

modified=$(find fileName.txt -mtime -1)
if [[ -n $modified ]]; then
    echo OK
else
    echo ERROR
fi

As a piece of advice you may have to read carefully what atime and ctime means to the system time.

edited Sep 05 '16 at 16:33

answered Sep 05 '16 at 16:22

Marco Silva

323
1
6

score 0 · Answer 3 · answered Sep 05 '16 at 17:01

This works for me.

today=$(date +"%m-%d-%y")
filedate=$(date +"%m-%d-%y" -r fileName.txt)

echo $today
echo $filedate
if [ "$today" == "$filedate" ];
then
echo $today;
echo $filedate;
echo 'Backup OK';
else
echo $today;
echo $filedate;
echo 'Backup ERROR';
fi

Bash backup checker

3 Answers3