Bash Script Help - Tar not working with variables?

Question

Am trying to backup set folders based on yesterday's date by using a bash script and CRON task.

The folder structure of the site is like this:

/home/admin/domains/mysite.com/public_html/media/2014/March

And I would want to back-up that folder to this file:

/home/admin/domains/mysite.com/public_html/bk/mediabackup-March-2014.tar.gz

So created this script:

---

#!/bin/bash

NOW=$(date -d "12 hours ago" '+%m')

NOWYEAR=$(date -d "12 hours ago" '+%Y')

MONTHS=(Dummy January February March April May June July August September October November December)

NOWMONTH=${MONTHS[3]}

FILE="/home/admin/domains/mysite.com/public_html/bk/mediabackup-$NOWMONTH-$NOWYEAR.tar.gz"

PATH="/home/admin/domains/mysite.com/public_html/media/$NOWYEAR/$NOWMONTH"

tar -zcvf $FILE $PATH

---

When I run this script though shell, I would do this:

bash script.sh

And it could come up "command not found" - not sure why it's not working?

Any help would be great, thanks :)

Answer 1

By overriding the shell's built-in PATH variable, you are causing it to not find the tar command. Use another variable name, and generally, refrain from using uppercase variable names.

Answer 2

No need to hard-code the month names:

read year month < <(date -d "12 hours ago" "+%Y %B")
echo "$month-$year"

March-2014